Modal verbs (such as can, could, shall, should, will, would, may, might, and must) combine with verbs in the bare infinitive to express information about the verb such as possibility or necessity.

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When to Use “Could, Would , Will and Can”? [duplicate]

When to Use "Could, Would , Will and Can"? Could you please send me that email? Would you please send me that email? Will you please send me that email? Can you please send me that email? Please ...
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Is “Jack could get to work earlier” deontic or epistemic?

Please consider: Jack could get to work earlier. Is this use of could in the dynamic modality about Jack’s inherent ability, or is this the could of epistemic modality about the speaker’s ...
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“Could not have been” vs. “must not have been”

What's the difference between "could not have been" and "must not have been"? For example, That could not have been an easy task. That must not have been an easy task. I've seen both ...
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Confusion about modal and auxiliary verb sentence structure [duplicate]

"Little did he realize that ..." What is the structure of this sentence with the past tense of the auxiliary verb 'do' in the beginning ? 2) "Otherwise, could we..." or "Otherwise, we could..." ?
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“May” & “Might”: What's the right context?

I may not be coming in tomorrow... I might not be coming in tomorrow... When could I use "may" & "might"?
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Inverted conditional sentence using 'can' and 'will'

On this page in Wikipedia!, it states for first conditional sentences: The condition can also be expressed using the modal verb should. This form can be used to make an inverted condition ...
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Can a hypothetical “could” main clause stand on its own without an expressed conditional?

I have been reading Meaning and the English Verb (Leech, Geoffrey N. 2004). I like its systematic treatment on tense, aspect, mood, and modality. I think it's a must-have for any advanced ESL ...
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could and might to talk about future possibility

I have problem with using could in the future possibilities for example: They have the technology, but unless the government makes stricter laws, car companies ____ do it. With which one should I ...
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What is the difference between 'can', 'could', 'may' and 'might'?

I'm a native English speaker and I've been doing some research into English grammar for a programme I'm working on. However, on looking into modal verbs, I've only just come to appreciate how subtle ...
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Is it correct to say “I was sure after a year I would get over it”?

My pet dog died last summer, she was the only one I had, but I was sure after a year I would get over it. Or should I say I had get over it there instead?
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Grammar: French conditionnel in English?

Could anybody help me here, please? I’d like to know the grammatical form of the verb “can" in the following examples: 18y old Tim is asked by a relative what he’s going to do with his life. ...
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What’s the difference between “if I were” and “if I would be”? [closed]

Can someone tell me the difference between these two phrases: if I were rich if I would be rich I am not a native English speaker, so it’s hard for me to see any difference in meaning between ...
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Is “shall” an appropriate word for a scientific thesis? [closed]

May I use the word shall in my scientific thesis? As in The relevant ones shall be introduced in the following. Or is shall considered slang or outdated?
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What kind of construct is 'would that that were all'?

There is a place in Bram Stoker’s Dracula where I can’t quite parse the grammar: 8 May. — I began to fear as I wrote in this book that I was getting too diffuse. But now I am glad that I went ...
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Using “will” after “if”

I've been told that native-speakers don't ever use "will" after "if", and that saying it this way is a not-native style. So from the film (Harry Potter, pt5) I noticed a line that confused me. Look ...
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Can “may” be an infinitive

I was reading this article http://www.organics.org/8-beers-that-you-should-stop-drinking-immediately/ when I saw Propylene Glycol is controversial, and is said to may be potentially harmful to ...
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Nuances in variants of “I should/would/∅ think so”

What is the difference between saying: I should think so. I would think so. I think so. And also what does using should in this way mean? It is strange you should say you have seen her, seeing ...
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Are modal verbs finite or non-finite?

According to Oxford Dictionaries Online, finite ... 2 Grammar (of a verb form) having a specific tense, number, and person. non-finite ... Grammar (of a verb form) not limited by tense, ...
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Future Perfect in the Past

Can I use should have done for the future just like will have done? For example: It should have been finished by next Monday. Which basically means It should be finished by next Monday but with ...
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Why is “cannot” spelled as one word?

Why is “cannot” spelled as one word whereas other similar constructions such as “do not,” “will not,” “shall not,” “may not” and “must not” are spelled as two words (unless they are contracted as ...
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“would I need” or “will I need” What is the correct sentence?

I don't know which sentence is correct for my formal letter? As a foreigner will I need any work permit or personal accident insurance? As a foreigner would I need any work permit or personal ...
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Are “was/were able to” and “could” interchangeable?

In a grammar book, the claim was made that in the following sentences one cannot substitute "was/were able to" with "could." The fire spread through the building very quickly, but everyone was ...
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What is the usage of “need to want”?

"Indeed, whoever buys this needs to want a tablet and laptop in more or less equal measure." "Needs to want"? Isn't it a kind of unnecessary way around saying: "I think that people buy this if they ...
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When should we use “can”, “could”, “will”, “would”?

Most of the people says I wish I could, I wish you would. Can't we use I wish I can, I wish you will? I'd like to know what the main difference between the usage of can/will and could/would is.
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Why “can” not “could” in “She was one of those people who can. . . .”?

The following sentence is from George Orwell’s Nineteen Eighty-Four, occurring in chapter 5 of part 2: She was one of those people who can go to sleep at any hour and in any position. Why is ...
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could have done vs could do [duplicate]

I always suspected that the idiot in the tux could not have done it on his own. In this sentence, if we said could not do instead of could not have done what would be the difference in meanings ...
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Is “Can you carry this book?” acceptable? [closed]

Is it grammatically correct to say: Can you carry this book? I said this to a friend and this person commented that I need to learn grammar. To me the statement seems grammatically correct and ...
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The modal verb would

Longman Advanced Learners' grammar says: (p 27/7) Dad would always help us out financially when we were at university, however difficult it was for him. Is it correct to use 'would' in this ...
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Why is “that would be me” more certain than “that is me”?

I have been reading these two posts on would: Why "that would be me"? (part 1) & Why "that would be me"? (part 2) If you want a domestic SUV, then the best choice would be the Ford Escape ...
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When did periphrastic tenses stop being tenses?

English sometimes has several different ways of expressing the same thing. For example, it can form a possessive either by using an old case inflection: The dog’s tail was always wagging. Or it ...
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“Having to” usage

I am confused in the usage of "having to" in a sentence, mentioned below. Which one is correct/appropriate? The trouble is having to backup … or The trouble is in having to backup ...
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How many tenses are there in English?

Do we have 16 tenses in English? With future present past future in the past in these forms simple continuous perfect perfect continuous Can we manipulate these together to create English ...
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“If the robot can learn from a human, it can/could keep track of humans.”

I have the following sentence and I don't know whether "can" or "could" would be a better choice. If the robot can learn from a human, it could keep track of humans. If the robot can learn ...
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What tense uses a modal with “be” and a past tense verb

I am trying to determine the tense of a certain verb group. This group uses a modal/auxiliary with "be" and the past tense of the action verb. Examples: He may be finished. She must be ...
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What modal verbs do natives use nowadays?

We are being taught English by a native speaker from Alaska. He states that many of modal verbs we were taught are outdated and have been replaced. E.g.: We must ➙ We have to May I ...
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What is the infinitive of “can”?

Like the title says: I don't think "to can" is right :) I mean "can" as in to be able to. I'm aware of other meanings. I can't find the answer here. (There's What is an "infinitive"? which ...
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“need to do” vs “need do”

Consider: I need to do this. I need do this. My English grammar knowledge tells me that "need" doesn't have the same status as the modal verbs "may", "can", "should" and what not. Hence the second ...
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“I have to” vs. “I must”

When would you use the following? I have to go the market. I must go to the market. I need to go to the market. If I replace 'have' with 'had' would you have any other way to say it? E.g. I had to ...
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“Must be” with a meaning like “must do”

I see that somebody must do something usually means that someone is obliged to do something. I also see that you must be kidding me means that it is highly likely that you are kidding me. But can ...
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Are “should” and “if” interchangeable at the beginning of a sentence? [duplicate]

Possible Duplicate: A special use of “should”? If "should" comes at the beginning of a sentence, and the sentence is not a question, then can it be replaced with "if?" Is there any ...
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A special use of “should”?

I saw a sentence like this: Wilkinson is contesting the release, and threatened to sue should it be released. I could understand it but do you know what do they call this kind of use of "should" ...
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The verb “should” as a conjunction [duplicate]

Here is the phrase from Wikipedia: CFO Peter Klein has said that Microsoft has no alternate plan should its current mobile strategy fail. Another example: Should Microsoft’s tablet and phone ...
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Do serious grammarians endorse the “Can I”/“May I” distinction?

Just now, I wanted to ask a question that was something like, "Can I get a thorough list of all the parts of speech that a sentence can be broken down into?" But then a nagging voice appeared in my ...
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Have I transformed this reported speech correctly? [closed]

She asked the teacher what should she do. Should it read as - She asked the teacher, What has to be done? Please explain why the sentence might be incorrect.
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Is “must” ever grammatical as a past tense verb?

I have seen uses of must that appear to be in the simple past tense. Sometimes these seem grammatical, but sometimes not. Examples that help illustrate my confusion: He knew he must go to New York ...
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Can “mustn't” be used for conclusions?

I heard this sentence in an American film a while ago as I was watching it on DVD (the part after but is verbatim): "I'm doing my best but I mustn't be doing it right." This is something I ...
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Why is the same modal auxiliary, 'may/might' used to ask permission and for uncertainty?

"May I go to the bathroom?" and "I asked if I might go to the bathroom." The modal auxiliary 'may/might' is used to ask permission. "He may not have understood your question." and "He might ...
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“Should” versus “would”

The NOAD reports the following notes about should and would: The traditional rule is that should is used with first person pronouns (I and we), as in I said I should be late, and would is used ...
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“Can” or “could”, which is grammatically correct?

I'm a call center agent. When I ask to transfer the call to the authorized person, which form should I use: Can I speak to...? or Could I speak to...?
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What is the difference between “have not to” and “have to not”?

English isn't my native language, of course, to ask something like this. I personally thought that "have not to do something" and "have to not do something" were the same. But recently, I've seen a ...