Questions about Present Perfect vs. Simple Past

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11
votes
3answers
31k views

“…didn't finish…yet” versus “…haven't finished…yet”

If I worked on something yesterday but it was not finished, which tense should I use? I didn't finish it yet or I haven't finished it yet
114
votes
6answers
26k views

How do the tenses and aspects in English correspond temporally to one another?

Non-native speakers often get confused about what the various tenses and aspects mean in English. With input from some of the folk here I've put together a diagram that I hope will provide some ...
2
votes
3answers
4k views

When do I use present perfect tense instead of the simple past? [duplicate]

I've finished my work. I finished my work. When do I use one or the other?
10
votes
3answers
76k views

Difference between 'haven't …yet' and 'didn't… yet'

I was wondering what the difference was between a sentence with have and one with do. For example this one: They haven't started yet. They didn't start yet. Is there a difference?  ...
7
votes
3answers
19k views

“I just ate them” and “I've just eaten them” — What's the difference in American and in British?

I know there are differences between American and British English in this area. So when answering, please specify whether you speak American or British English.
11
votes
6answers
9k views

“I have never said” versus “I never said”

I have never said this. I never said this. Is the usage of have in the first sentence justified or grammatically correct? What is the difference in meaning? When should I use one form over ...
6
votes
3answers
15k views

Is it correct to say “I found the map” or “I have found the map”?

Is it correct to say "I found the map" or "I have found the map"?
16
votes
4answers
9k views

When will “Present Perfect vs. Past Tense” cases be affected by culture?

Regarding actions taken in the past, besides the differences those two tenses have semantically, my teacher shared that it could be a British vs American English case. When talking about past action,...
14
votes
4answers
7k views

When is the present perfect tense used instead of the past tense?

When is the present perfect tense used instead of the past tense? I know that the present perfect tense is used when some adverbs (e.g., never, ever) are present in the sentence; the same is true ...