How and when I "HAS", "HAD", "HAVE BEEN" ?
I have studied english long time ago, and always had difficulties in apply correctly this gramaticals forms of the past. I never understand what is past continous and this kind of structures. Please, someoune could help me in teach this easily?

Question

How and when I "HAS", "HAD", "HAVE BEEN" ?
I have studied english long time ago, and always had difficulties in apply correctly this gramaticals forms of the past. I never understand what is past continous and this kind of structures. Please, someoune could help me in  teach this easily?

Answer

Hi Alexandre,

This is quite a general question, and I recommend that you look up "present perfect" and "past perfect" (as well as "perfect continuous") with the key word "exercises".

There are already plenty of explanations and opportunities to practise this piece of grammar online. Feel free to come back if there's a specific problem which you can't solve.  Good luck!