What are the SIGNAL WORDS that go with this tense? 

Since, for, it’s the first/second/etc time, before, already, yet, ever, just, still, recently, up to now, until now, so far etc 

Do we use the present perfect simple instead of the present perfect continuous for situations and states that started in the past and are still true?

Talk about a possession you have had for ten years/a long time. 

Talk about a group you have belonged to for a long time. 

Do we use the present perfect simple for a series of actions continuing up to now?

Where have you been and what have you done today? 

How many things have you bought this week? 

Do we use the present perfect simple for completed actions at a time in the past which is not specified? 

Have you ever been abroad?

Have you ever tried Indian food? 

Do we use the present perfect simple for completed actions where the important thing is the present result? 

Have you finished your homework?

Imagine you lost your keys a few minutes ago: Have you found your keys? 

Do we use the present perfect simple for actions completed recently? 

Have you been on a trip recently? 

Have you been to a restaurant lately? 

Do we use the present perfect in the future clauses? 

Will you give me more homework once you have finished the current homework? 

Will there be more or fewer jobs once machines have become more intelligent? 

Do we use the past simple instead of the present simple in some cases mentioned above in US English? 

US English: Did you find the answer yet? Yes, I already found the answer.

UK English: Have you found the answer yet? Yes, I have already found the answer. 

Is Gotten: used in informal US English instead of Got? 

US: I haven’t gotten the books yet. 

UK: I haven’t got the books yet. 

US: I just arrived.

UK: I have just arrived.