Present perfect

Question 1

form?

Answer 1

Have/has + 3.p.f.
have not / hadn’t
has not / hasn’t

e.g. I have bought a telephone

Question 2

when is it used

Answer 2

• To express an action which happened in the past, but the time is notnmentioned or known
  e. g. It has to be something you have experienced.
• Is used about actions which started in the past and they are still continuing in the past
  e. g. he has lived here since he was 8

Question 3

signal words

Answer 3

ever, never, already, yet, just