1 where did you go last night ? 

-> thì QKĐ 

-> s + v2

-> sau did + v nguyên mẫu 

2 what were they doing earlier ?

-> so sánh hơn thì QKTD 

-> s + was / were + v-ing

3 were you at hom when he phoned

-> you đi với were 

-> thì QKĐ 

-> s + v2

4 what was mum doing at eight last night ?

-> thì QKTD 

-> s + was / were + v-ing 

5 were you running when you fail

-> thì QKTD 

-> s + was / were + v-ing 

6 did you tidy your room in the morning 

-> thì QKĐ 

-> did + v nguyên mẫu 

7 were you listening to music at 10 last night?

-> thì QKTD 

-> s + was / were + v-ing

8 did they sell their house last year?

-> thì QKĐ 

-> did + v nguyên mẫu 

9 did Bill win the first prize at the competition?

-> thì QKĐ 

-> did + v nguyên mẫu 

10 was Vivian watching a DVD at 9 last night?

->

-> thì QKTD 

-> s + was / were + v-ing

$\text{1.}$ Where did you go last night?

$\text{→}$ Wh- question nên where đứng đầu câu

$\text{2.}$ What were they doing earlier?

$\text{3.}$ Were you at home when he phone?

$\text{→}$ Vì đây có 2 vế mà từ nối dk chỉ có when nên when ko đứng đầu

$\text{4.}$ What was Mum doing at 8 last night?

$\text{5.}$ Were you running when you fell?

$\text{→}$ when: thì

$\text{6.}$ Did you tidy your room in the morning?

$\text{→}$ Câu hỏi yes/ no đưa trợ V lên đầu

$\text{7.}$ Were you listening to music at 10 last night?

$\text{8.}$ Did they sell their house last year?

$\text{9.}$ Did Bill win the first prize at the competition?

$\text{10.}$ Was Vivian watching a DVD at 9 last night?