`Ans`:

`2`. The boy and the dog who are close friends play tricks in the city circus.

`->`…N (chỉ người) + Who + V + O

`3`. My grandmother expects to come back to her village.

`->`S + expect(s) + to V(nguyên mẫu) + something.

`4`. Are they going to build another overpass there?

`->` tobe +s+ving +o?

`5`. Your daughter is not old enough to travel to Paris alone.

`->`S + be + adj + enough + (for somebody) + to V​​

`6`. He plays the guitar for a small group so that he can earn some money.

`->` s+v_s,es+o

`->` S + V + so that + S + V : vì vậy

`7`. How long have you played for the national football team?

`->`  How long + have/has + S + Ved/3?

`8`.

`-` It was not until I left school that I realized the value of education.

`->` It + is/was + not until + thời gian/mệnh đề thời gian + that + mệnh đề chính.

`-` Not until I left school did I realize the value of education.

`->` Not until + thời gian/mệnh đề thời gian + trợ động từ + chủ ngữ + động từ chính

`9`. She finds working with children interesting.

`->` FIND + V-ing + Tính từ.

`-` s+v_s,es+o

`10`. The plants in the garden haven't been watered for a long time. 

`->` S + have/has (not) been + V3.