... The present perfect tense (Hiện tại hoàn) I/ Form S+ have/ has+ V( past participle ) II/ Adverbs of time +,Since , ever, never, for , just ... 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 :...