The present perfect tense

The present perfect tense (Hiện tại hoàn)
I/ Form
S+ have/ has+ V( past participle
)
II/ Adverbs of time
+,Since , ever, never, for , just .
+,Ready, lately , recently, ( after have / has or at the end of the sentence )
+,Yet( in negative or yes-no question )
+,So far , up to now, up to present , since then ...
+,In recent years , this month , for / during the last few years ..
III/ Uses
1/ An action started in the past lasting up to present and still likely to happen in the future :
Ex :
He has lived in Haiduong for 6 years
2/ An action in the past but present result:
Ex :
She has bought a new house .
3/ A part of action but the speaker doesn't know the time or doesn't want to mention the time of
action
Ex :
She has left my house .
4/What you have / haven't done up to now today, this week, this month )
Ex :
This is the first time I have gone to HoChiMinh City
5/When--If Clauses :
Ex :
If you have finished the test , you can go home