I haven't seen Tom on his wedding day.

S + last + V2/ed ........ -> S + have/has + not +V3/ed +.....

Two children was found in the forest yesterday.

-> Bị động quá khứ đơn : S + was/were + V3/ed

He told to Lily that he would speak to her mother the next day

-> Cấu trúc câu tường thuật : S + say(s) / said hoặc tell / told + (that) + S + V

Will -> would,  Can -> could

Mary asked to Peter when he had bought his new car

Cấu trúc câu hỏi có từ hỏi (Wh-Question) : S + asked (+Object) + What/ When/… + Subject _ Verb

1.I haven't seen Tom on his wedding day .

-> S + last + Ved/cột 2 + ........

-> S+ hasn't/haven't + Vpp + ......... 

2.Two children was found in the forest yesterday .

-> Câu bị động của thì Quá Khứ Đơn 

-> S + was/were + Vpp + ( by O ) 

3. He told to Lily that he would speak to her mother the next day .

-> Câu tường thuật 

-> S + say/said or tell/told + (that) + S + V + ......... 

-> tomorrow => the next day , will => would 

4.Mary asked to Peter when he had bought his new car 

-> S + asked + to sb + wh-? + S + V ( lùi thì ) 

@Chae