`29`. It took me half an hour to write this letter.

`-` It takes + O + time + to-V: mất bao lâu làm gì

`30`. Two department stores have been built this year.

`-` Bị động HTHT: S + have/has + been + VpII + (by O)

`31`. Mrs Lan has taught English for twenty years.

`-` HTHT: S + have/has + VpII + for + time

`32`. I wish I could go to the party.

`-` Câu ước ở hiện tại: S + wish(es) + S + V-ed

`Question 29:` It took me half an hour to write this letter.

`=>` It takes/ took + sb + time + to V: Ai mất bao nhiêu thời gian để làm gì.

`Question 30:` Two department stores have been built this year.

`=>` Cấu trúc bị động: S + has/ have + been + Vp2

`Question 31:` Mrs Lan has taught English for twenty years.

`=>` Cấu trúc thì HTHT: S + has/ have + Vp2

`Question 32:` I wish I could go to the party.

`=>` Cấu trúc wish ở thì HTĐ: S + wish(es) + (that) + S + Ved/2

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