Exercise 1:Viết lại câu sao cho nghĩa ko đổi 1.He started working as a bank clerk 3 months ago. =>He has................................................................ 2.Is has been 5 year since we first flew to Singapore. =>We have.............................................................. 3.I last had my hair cut in November. =>I haven't........................................................... 4.The last time we calked each other was 5 months ago =>We haven't..................................................... 5.It is a long time since we last met. =>We haven't........................................ 6.When did you have it? =>How long........................................ 7.This is the first time I had such a delicious meal. =>I haven't..................................................... 8.I haven's seen him for 8 days. =>The last.......................................... 9.To day is Saturday.I haven't taken a bath since Wednesday. =>It is............................................................. Exercise 2:Mỗi câu sau có một lỗi sai.Tìm và sửa chúng. 1.I haven't cutted my hair since last June. ....................................................................... 2.She has not working as a teacher for almosst 5 year. .......................................................................... 3.The lesson haven'e started yet. ........................................................................... 4.Has the cat eat yet? .................................................................... 5.I am worried that I hans't still ffinished my homewwork yet. ...................................................................... 6.I have just decidedto start working next week. .................................................................... 7.He has been at his computer since seven hours. ...................................................................... 8.She hasn't receivedany good news since a long time. ....................................................................... 9.Mu father hasn't playedany sport for last year. .................................................................... 10.I'd better have a shower.I hán't hadone since Thursday. .............................................................................