`29,` My son asked me to help him with his homework the moment I arrived home. `->`No sooner ______________________________________________ . `30,` This is the first time that people from both communities have worked together. `->`Never before ___________________________________________ . `31,` Richard is doing as much overtime as he can. His son starts college this year. (RELATIVE CLAUSE) `->`__________________________________________________________ .

`29.` No sooner had I arrived home than my son asked me to help him with his homework

`->` Đảo ngữ : No sooner + had + S + P2 + than + S + Ved : Ngay khi...thì.....

`30.` Never before have people from both communities worked together.

`->` Đảo ngữ : Never before + Aux + S + V : Chưa bao giờ trước kia

`->` This is the first time + S + have/has + P2 : Đây là lần đầu tiên

`31.` Richard, whose son starts college this year, is doing as much overtime as he can.   

`->` Whose thay thế cho TTSH "His", và luôn luôn đứng sau từ mà nó bổ nghĩa.

`29.` No sooner had I arrived home than my son asked me to help him with his homework.

`->` Đảo ngữ `-` No sooner:
No sooner + had + S + P2 + than + S + Ved/V2: vừa mới...thì...

`30.` Never before have people from both communities worked together.

`->` Đảo ngữ `-` Never:
Never + aux + S + V (theo thì)

`31.` Richard, whose son starts college this year, is doing as much overtime as he can.

`->` whose là đại từ quan hệ dùng thay thế cho danh từ chỉ sự sở hữu của vật/người đứng trước