SỰ PHỐI HỢP THÌ

The students_______the floor when the headmistress came in

• were mopping

• mop

• have mopped

• are

Answer explanation

Mẹo: vế sau có ''came in" (QK) => đáp án chọn QK

Giải thích: Dùng thì Qk để diễn tả hành động đang xảy ra thì có hành động khác xen vào

Dịch: Các học sinh đang lau sàn thì hiệu trưởng bước vào

the workers of this factory_____working since the pandemic broke out

• had stopped

• stopped

• stop

• have stopped

Answer explanation

HTHT + SINCE + QKD

Dịch: Công nhân của nhà máy này đã ngừng làm việc kể từ khi đại dịch bùng phát.

Mary will go to the theatre____

• after her roomate had returned

• before her roomate returned

• when her roomate returns

• as soon as her roomate returned

Answer explanation

Mẹo: Mệnh đề chia tương lai => loại các mệnh đề chia quá khứ

Dịch: Mary sẽ đi xem phim khi bạn cùng phòng của cô ấy trở về

An will have taught in this primary school for 3 years______

• when she turned 40

• once she turned 30

• by the time she turns 30

• after she had turned 30

Answer explanation

Mẹo: mệnh đề chia tương lai=> loại QK

CT: TLHT + BY THE TIME + HTD

Only after Nam______the exam room did he relise that he had forgotten to bring his calculator

• gets

• had got

• has got

• was getting

Answer explanation

Only after QKHT+ đảo ngữ QKD

Since Lan moved to Paris, I ______ anything from her

• didnt hear

• havent heard

• dont hear

• wasnt hearing

Answer explanation

SINCE QKD, HTHT

Ms. Han will have made a birthday cake for her son_______

• before he got home from school

• as soon as he got home from school

• until he got home from school

• by the time he gets home from school

Answer explanation

Mẹo: tương lai không đi cùng qk

While Ms. Nhung was teaching in class 4B, she ______ a piercing scream outside

• heard

• has heard

• was hearing

• had heard

Answer explanation

1 hành động đang diễn ra thì có 1 hành động khác xen vào

Not until Trang __________the labour market was she aware of the importance of learning E

• enters

• has entered

• had entered

• is entering

Answer explanation

Not until + QKHT + đảo ngữ QKD

Philips accidentally____his mother's favourite coffee cup yesterday morning

• had broken

• has broken

• breaks

• broke

Answer explanation

DHNB: yesterday morning => QKD