6. Present perfect continuous
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1. A state, which lasts up to the present moment
I've been waiting for you for three hours!
2. An incomplete activity
I've been cleaning the house but I still haven't finished.
3. To emphasize duration
I've been writing letters all morning.
4. A recently finished activity
I've been running. That's why I look hot.
5. A repeated activity
I've been taking French lessons this year.
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There may be little contrast when some state verbs are used.
How long have you lived here?
How long have you been living here?
Some verbs (sit, lie, wait, and stay) prefer the continuous form.
Completed: emphasis on achievement
I 've ironed five shirts this morning.
Incomplete, recently completed: emphasis on duration
I've been ironing my shirts this morning.
| 8. Time expressions with present tenses:
Indefinite: yesterday, last week, on Sunday, often, every day\year\month, usually, always, twice a week, daily, monthly
Perfect: since 1968, already, yet, lately, so far, just, since, by 5 o’clock, (for past: after, before, when)
Continuous: from 3 till 6, all day long, for months, during the day, at the moment
Perfect Continuous: since, for, all this year\day, all (my) life, during the 20th century, for centuries\ years
Many time expressions are not associated with a specific tense.
I haven't seen Helen recently. I saw Jim recently.
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