37. While I was taking a shower, the lights went out.

38. John told me that he needed to get back his book.

39. The house was decorated by my family before Tet holiday.

40. It's interesting to talk to everyone.  (gt: it's + adj + to + V)

37. while the lights went out, I took a shower

cấu trúc: While+ S+ V

38. John told me (that) he needed to get back his book

lùi thì HTĐ->QKĐ

cấu trúc câu trần thuật: S + say(s)/said hoặc tell(s)/told + (that) + S + V.\

39. the house was decorated by my family before the Tet holiday

lùi thì: S + was/were + V-ing + OS + was/were + being + P2

cấu trúc: Câu chủ động S1 + V + O => Câu bị động S2 + TO BE + PII

40. it's interesting to talk to everyone

cấu trúc: it's interesting + to V

@tnhiuwu