Affir: S + have/has + been + gerund Susan has been cooking for us all afternoon.
Neg: S + have/ has + not + been + gerund They haven't been studying this term.
Int: have/ has + S + been + gerund Have you been sleeping?
Use:
for actions that took place in the past but have consequences in the present time.
Time expressions:
how long, for, since, recently, lately
- Now, it's time to practise:
http://www.englishgrammarsecrets.com/presentperfectcontinuous/exercise3.swf
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