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are used to talk about the actions that are in progress at a specific moment in time; they highlight the moment that the action is takes place.
Present progressive tenses are composed of the...
auxiliary verbs "to have", "to be", and "to do" + the present participle of the main verb (ing)
What 2 types of action does the present progressive tenses take?
1. actions happening now
2. actions occurring over a period of time which includes the present.
The past progressive tense.....
indicates continuing action, something that was happening, ongoing, at some point in the past.
The past progressive indicates a limited duration of time.....
thus an convenient way to indicate that something took place (in the simple past) while something else was happening.
are used to talk about actions that are in progress at a specific moment in time; they highlight the moment that an action takes place.
are compound tenses formed with the auxiliary "have" indicating that the action of the verb is complete.
Present perfect tense...
is used to express an action that occurred at an unspecified time in the past or an action that started in the past and continues into the present.
The present perfect is a compound tense form with the....
auxiliary "have" in the present tense + the past participle of the main verb (he has spoken, I have walked, we have written)
is used to express an action that was completed in the past before another action or event which also occurred in the past.
She remembered (2) that she had forgotten (1) her keys.
remembered (simple past) had forgotten (past perfect) (Both actions 1 and 2 occurred in the past, but action 1 preceded action 2. Therefore, action 1 is in the past perfect.)
The past perfect is a compound tense formed.....
with the auxiliary "have" in the past tense (had) + the past participle of the main verb: I had walked, he had seen, etc.
They had moved (1) before school opened (2) in the fall.
Action 1 preceded action 2. Therefore, action 1 is in the past perfect.
Future perfect ....
is used to express an action that will be completed in the future before another action or event in the future.
By the time we leave (2), he will have finished (1).
Both actions 1 and 2 will occur at some future time, but action 1 will be completed before action 2 takes place. Therefore, action 1 is in the future perfect tense.
The future perfect is a compound tense formed with the....
auxiliary "have" in the future tense (will have) + the past participle of the main verb: I will have walked, she will have gone.
The future perfect is often used following expressions such as...
by then, by that time, by + a date
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