Bài tập chuyển đổi thì hiện tại hoàn thành sang quá khứ đơn 1/ How long have you been here? -> 2/ This is the first time I have seen such a beautiful girl. -> 3/ I haven’t gone to school for 4 months because of covid-19. -> -> -> 4/ I have never visited Halong Bay before. -> 5/ I haven’t cheated in exam for years. -> -> -> 6/ I have married for 10 years. -> 7/ How long have she lived in Danang? 8/ He hasn’t smoked for 2 years. -> -> -> 9/ I have learnt French for 3 years. -> 10/ I haven’t met her for 5 days. -> -> -> giúp mình nha