1The flight to Vientiane have departed
=> has been departed (câu BĐ)
2 She hán't finish the letter
=> hasn't finished ( Thì HTHHTHT)
3 I forget that girl's name already
=> have forgotton (thỳ HTHT, dấu hiệu: already)
4 Fred's brother just graduates from university
=> graduated ( thì HTHT)
5 I am trying to learn English for years
=> have tried ( thì HTHT, dấu hiệu: for years)
6 I have been waiting forr two hours, but she not come yet
=> have waited (HTHTHTHT)
7 she reads all the works of Dickens. How many have you read?
=> has read
8 Mary rests in the garden all day because she is ill
=> rested