Present perfect (since, for, yet, just, never, ever) Present perfect (since, for, yet, just, never, ever)
U2 song: I still haven't found what I'm looking for. U2 song: I still haven't found what I'm looking for.
Simple past and present perfect: questions and answers Simple past and present perfect: questions and answers
Present perfect with just, yet, before, never, ever Present perfect with just, yet, before, never, ever
Present perfect or past simple and make do give collocations Present perfect or past simple and make do give collocations