1. Affirmative : subject + has/ have + been + v (ing) + since/ for
Example :
- I have been running since 5 O’clock.
2. Negative : subject + has/ have + not + been + v (ing) + since/ for
Example :
3. Interrogative : has/ have + sub + been + v (ing) + since/ for
Example :
- Has he been working for a week?
4. Interrogative dan Negative : has/ have + subject + not + been + v (ing) + since/ for
Example :
- Have you not been sleeping for 8 hours?
Note :
Example :
- Have you not been sleeping for 8 hours?
Note :
Since : for example, since yesterday, since last year, since 10 o'clock yesterday, since this
For: period of time, eg 2 days, a week, 10 minutes, one hour.
For: period of time, eg 2 days, a week, 10 minutes, one hour.
'Since' and 'for' is also used in the perfect tense.Example :
- Have you not been sleeping for 8 hours?
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