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