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1 vote
Accepted

I hope you (have) found this useful

I agree with you. If "I enjoyed it", the occasion has already ended (in the past). If "I have enjoyed it", the occasion is merely ending soon (or now). Often these two tenses are ...
Patrick Szalapski's user avatar
1 vote

Grammar of a present perfect continuous sentence

The rule about present perfect is that you cannot use finished time expressions. In your sample sentence, the time expression that modifies the present perfect is "since she left the hospital ...
gotube's user avatar
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