Cấu trúc với câu hỏi Wh- questions : Wh (who, what, when…) + be (was/were) + S + V-ing+ O?

1. When was Mike reading the document?

2. Where was Sarah waiting for him ?

3. What were the students talking about?

4. Who was writing the letter?

5. What was Lisa looking at?

@Día 

#Grave Diggers

$\text{Thì Qúa khứ tiếp diễn ⇒ Wh-question + was/were + S + V-ing + ...?}$

$\text{1. When was Mike reading the document?}$

$\text{2. Where was Sarah waiting for him?}$

$\text{3. What were the students talking about?}$

$\text{4. Who was writing a letter?}$

$\text{5. What was Lisa looking for?}$