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English grammar

Posted: Thu Mar 08, 2018 2:24 pm
by haveaball
Hi guys! please help me!
I am studying English grammar and having some troubles with this question:
I hope you to express an opinion about:
When I called them, they didn't answer. They pretended........already:
a. to sleep
b. sleeping
c. having slept
d. to have been sleeping
According to me, both answer A and answer D can be correct but I have never seen structure: to have been sleeping.
So, which one is correct?, Please help me.
Thanks so much.

Re: English grammar

Posted: Sat Mar 10, 2018 4:35 am
by Alan
None is acceptable.

The idiomatic answer would be 'to be sleeping'.