I ............. medicine for three years but then I stopped. a. studied b. have studied c. had studied d. was studying
2 câu trả lời
I ............. medicine for three years but then I stopped.
a. studied
b. have studied
c. had studied
d. was studying
⇒Dấu hiệu: For three years
⇒Thì Hiện tại hoàn thành
Khẳng định: Cấu trúc: S + have/ has + VpII
Phủ định: Cấu trúc: S + have/ has + not + VpII
Nghi vấn : Cấu trúc: Have/ Has + S + VpII +… ?
Đáp án:
`B.` have studied
`-` vì có "for three years" dấu hiệu thì HTHT.
`-` Cấu trúc của thì: S + have/has + Ved/V3 ....
