Perfect tenses are used to express actions that occurred in the Past. Nevertheless, certain conditions and some extra information are necessary if you want to use this tense instead of the Simple tenses, for instance. Now, consider a question upon the following words: What - your friends - you - to chat- on the phone - for so long. The best question with a perfect tense would be:

Check the CORRECT answer:

C) What did your friends and you been chating on the phone for so long?

D) What have your friends and you been chatting on the phone for so long?

A) What have your friends and you be chatting on the phone for so long?

B) What had your friends and you chat on the phone for so long?

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