Revision-Sự phối hợp thì

Chọn công thức đúng

• By the time QKĐ, QKHT (had PP)

• By the time QKHT (had PP), QKĐ

By the time Alpha finally graduated from high school, he _________ seven different schools because his parents moved frequently.

• attended

• was attending

• had attended

• had been attending

By the time he _________ to the airport, his plane had taken off.

• arrived

• had arrived

Chọn công thức đúng

• By + Thời gian ở quá khứ, QKHT

• By + Thời gian ở quá khứ, QKĐ

By the end of last month, the author __________ around 10 novels.

• wrote

• had written

By 1999, the central park _________ as one of the most interesting area in the city.

• was recognized

• had been recognized

Chọn công thức đúng:

• HTHT + since + QKĐ

• QKĐ + since + HTHT

Since I left Venezuela six years ago, I ________ to visit friends and family several times.

• return

• will have returned

• am returning

• have returned

Peter, have you eaten since you ________ home from football practice?

• got

• have got

• didn't have to go

• get

Chọn công thức đúng

• When/ After + QKĐ, QKHT

• When/ After + QKHT, QKĐ