In the following passage, what tense is the second sentence?
John said goodbye to his mother. He would never see her again.
I know it's not the past tense, which would be "He never saw her again."
In the following passage, what tense is the second sentence?
John said goodbye to his mother. He would never see her again.
I know it's not the past tense, which would be "He never saw her again."
Back "translation" to the (historical) present tense:
John says goodbye to his mother.
He will never see her again.
Ah, but we want the past tense. So, we write:
John said goodbye to his mother. He would never see her again.
Here, the past tense of will is would.
In some cases would can be used as the past tense of will, for example, in indirect speech introduced by a verb in the past tense: I promised that I would visit her the next day.
That is the past tense of: He promises that he will visit her one day.
Some linguists like to just call this particular usage a modal. I don't.
'He would never see her again.' refers to the past.
'Would' is the past form of 'will'.
'He will never see her again' refers to the future.
Direct: He said to her, 'I will never see you again'.
Indirect: He told her that he would never see her again.
In a comment, Professor Lawler argued:
Would is a modal auxiliary verb, like will, can, could, shall, should, may, might, must, and sometimes need and dare. They have their own very irregular syntax and meanings. Calling some of them "past tense" is historically accurate, but the usage died away except for idioms long ago, and modals don't otherwise inflect for tense, and rarely have any tenselike meanings, so I'm one of the linguists who don't call some, but not other, uses of would "past tense".
Although the comment does not explicitly say so, it, in virtue of being posted on this page, pragmatically implicates, that the sentence that the question is about cannot be classified as to tense. In the comments that followed, tchrist defended an apparently stronger claim, that we should not use tense to describe modal verbs, such as would, at all.
(This is posted here as a 'community wiki' answer to make it easier for the future visitors to the page to see the full array of possible views of the matter.)
The term tense is defined in Merriam-Webster as:
a distinction of form in a verb to express distinctions of time or duration of the action or state it denotes
So, it's a verb form, not its meaning. If you disagree with this definition, you should edit your question. Assuming you don't, let's find out what tense the verb was and would are here:
a. I was wondering if you would agree with the definition.
I'm sure you'll agree that the verb was is easily the past form of the verb be, despite the fact that was does not necessarily describe a past situation. Then, I'm sure you'll also agree that the verb would is easily the past form of the verb will, despite the fact that would does not necessarily describe a past situation.
Now, let's have a look at your example:
John said goodbye to his mother. He would never see her again.
Now, I'm sure you'll agree that the verbs said and would are in their respective past forms, regardless of whether they describe past situations or not.
If you're one of those people who argue that would is not the past form of will, and that would is an entirely different verb than will, or that would is not even a verb, good luck with your question, because there's no answering your question then.
The progressive/continuous tense is formed with a 'verb chain' (verbs with auxiliary verbs, etc) and add the present participle (-ing).
The combination in "He would never see her again" using 'would never' establishes a condition that begins now and continues into the future. Would can also imply a future action like in "I would tap dance" because it is an auxiliary/helping verb; it modifies the action.
EDIT: Though not utilizing a present participle, He would never see her again could be modified to He would not be seeing her again or He is not seeing her again as pointed out by @Mari-Lou A. However, since would is a modal verb, it could be seen as either a past progressive or present progressive. That is, an event that has already started (or starting now) and continuing into the future. Though, neither tense inherently changes the cognitive association of the phrase, "He would never see her again"
It’s the future imperfect.
Because, we are standing in the present, with John. At the time at which he is saying goodbye to his mother. We've flown back in time, in order to do that, in this sentence. We are looking back but actually, we are with him, back then.
‘He would’ is looking forward to the future, from back then, where he 'never sees her again'.
So it's the future imperfect.