1. When he came, I watched a football match on TV. -> was watching

when + QKĐ, QKTD

while QKTD, QKĐ

2. When Andrew saw the question, he were knowing the answer immediately. -> was knowing

3. Mai has stayed on her uncle's farm for last week. -> since

Thì HTHT: S + has/have + V3/ed + for/since...

Since: mốc thời gian

for: khoảng thời gian

4. I'm looking forward to hear from you . -> hearing

Be look forward to + V-ing

5. They asked me don’t talk during the discussion. -> not to talk

ask s.b to Vo

6. Would you mind if I ask you a private question? -> asked

would you mind + V-ing...?

would you mind + if I + V(2/ed)...?

1. C - watched - was watching(QKTD)

2. C - were knowing - was knowing(câu QKTD)

3. A - has stayed - had stayed (câu QKHT)

4. C - to hear - to hearing (looking forward to + V-ing)

5. C - don't - not to (câu gián tiếp)

6. B - ask - asked ( câu điều kiện loại II)