Both tenses are used to express that an action began in the past and is still going on or has just finished. In many cases, both forms are correct, but there is often a difference in meaning:
We use the Present Perfect Simple mainly to express that an action is completed or to emphasise the result.
We use the Present Perfect Progressive to emphasise the duration or continuous course of an action.
We use the Present Perfect Simple mainly to express that an action is completed or to emphasise the result.
We use the Present Perfect Progressive to emphasise the duration or continuous course of an action.
Result or duration?
Do you want to express what has happened so far or how long an action has been going on yet?
| Present Perfect Simple | Present Perfect Progressive |
|---|---|
| Result (what / how much / how often)
I have written 5 letters.
I have read 10 books.
| Duration (how long)
I have been writing for an hour
I have been reading for days
|
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