`3.` Mr. Brown whose team has lost the game looks very sad.

`-` Whose : của ai `->` Thay thế cho từ chỉ sở hữu của người hoặc vật trong câu.

`4.` I haven't spoken to her for two years.

`-` It's + time + since + S + last + Ved / V2

`=` S + haven't / hasn't + Ved / V3 + for + time.

`5.` Minh spends `2` hours doing his homework everday.

`-` S + spend ( s ) + time + V-ing

`=` It + take ( s ) / took + time + to + V`-`infi 

`6.` We used to school by bike when we were young.

`-` S + used to + V`-`infi : đã từng làm gì trong quá khứ nhưng giờ không làm nữa.

`1.` They have closed down the water park because it's not safe for children.

`-` HTHT : S + have / has + Ved / V3

`-` S + V + because + S + V : mệnh đề nguyên nhân `-` kết quả.

`-` It + is + adj + for + sb 

`2.` The exercise was too long for the students to do in ten minutes.

`-` S + be + too + adj + ( for sb ) + to V`-`infi 

`3.` Students should take part in as many extracurricular activities as possible.

`-` Take part in ( v.phr ) tham gia vào ...

`4.` Those students volunteered to provide meals for schoolchildren in remote areas.

`-` volunteer to provide sth for sb

`VI.`

`3.` Mr.Brown whose team has lost the game looks very sad.

`@` Whose là hình thức sở hữu của Who. Nó được dùng để hỏi "của ai"

`@` Cấu trúc: N (chỉ người, vật) `+` Whose `+` N `+` V

`4.` I haven't spoken to her for `2` years. 

`@` Thì hiện tại hoàn thành: S`+`has/have`+`(not)`+`V(ed,c3)`+`O...

`@` For`+`time/thời gian: trong khoảng thời gian bao lâu...

`5.` Minh spends `2` hours doing his homework every day

`@` Cấu trúc: S`+`spend`+`time/thời gian`+`V`-`ing..: ai, vật dành bao nhiêu thời gian làm gì...

`6.` We used to go to school by bike when we were young

`@` Cấu trúc: S`+`used`+`to`-`V...: ai, vật từng làm gì

`VII.`

`1.` They close down the water park because it's not safe for children

`@` Thì htđ: S`+`V(s,es)`+`O...

`@` S`+`V`+`because`+`S`+`V...

`2.` The exercise is too long for the students to do in `10` minutes

`@` S`+`tobe`+`(trợ đ.từ)`+`adj...

`@` Do sth in ..time: Làm cái gì trong khoảng t.gian bao lâu

`3.` Students should take part in many extracurricular activities as much as possible

`@` S`+`should`+`V`-`bare...: ai, vật nên làm gì

`@` As much as possible: nhiều nhất có thể

`4.` Those students volunteer to provide meals for schoolchildren in remote areas

`@` Thì htđ: S`+`V(s,es)`+`O...

`@` Provide sth for sb/sm: cung cấp cái gì cho ai

`giahan27511`