CAU HOI DUOI

Cong thuc : 

S + V + O , [ ] + DAI TU ? 

Trong do : 

Dai tu : Lay chu tu cau dau doi thanh dai tu 

Dan ong ---> he 

Dan ba ----> she 

Vat (so it ) --- -> it 

There --- -> there 

This --- -> it 

That --- -> it 

These --- -> they 

Those --- -> they 

So nhieu ----> they 

Cac dai tu nhu : they, he she ... thi giu nguyen 

[] : nhin o cau dau neu co dong tu dac biet thi chuyen thanh [] neu khong co thi muon tro dong tu do, does, did

Nhung dong tu dac biet co the chuyen ra vi tri [] ma khong can phai muon tro dong tu la:

- is, am, are, was, were

- wil, would

- can, could

- may, might

- should

- had ( better)

- have, has, had ( + p.p) - luu y neu phia sau khong co p.p ( cot 3) thi khong duoc xem la dong tu dac biet

- Neu cau dau co NOT, hoac cac yeu to phu dinh nhu : never, rarely, no, hardly ...., thi [] khong co NOT, neu cau dau khong co NOT thi [] co NOT

NHUNG DANG DAC BIET :

I am --------> Aren't I ? ( nhung neu la : I am not ... thi lai dung : am I ? ) 

Let's ....--------> Shall we ? 

Nobody, no one, everyone, everybody,Someone, somebody ...-----------------> [] they ?

One -------------> [] you/one

- Cau menh lenh ( khong co chu tu ) -------> Will you ?

VI DU : 

Lan can go, can't she ? ( dong tu dat biet dem can ra sau) 

Tom likes it, doesn't he ? (khong co dong tu dat biet nen muon tro dong tu does ) 

the dogs won't run, will they ? ( cau dau co not nen cau sau khong co not ) 

Go out with me, will you ? ( cau menh lenh ) 

Don't take it, will you ? ( menh lenh, du co not hay khong cung dung will you ) 

I am a student, aren't I ? 

Phan tren la nhung van de co ban cua cau hoi duoi du de cac em su dung trong chuong trinh pho thong, tuy nhien muon hoc cao hon de lam tot cac bai thi dai hoc hay chuong trinh chuyen ngu cua dai hoc thi phai hoc nhung dang "sieu kho" sau day:

1) Cau dau la I WISH:

- Dung MAY

- Vi du:

- I wish to study English, may I ?

2) Chu tu la ONE:

Dung you hoac one

Vi du:

One can be one's master, can't you/one?

3) Cau dau co MUST:

Must co nhieu cach dung cho nen tuy theo cach dung ma se co cau hoi duoi khac nhau

- Must chi su can thiet: => dung needn't

Vi du:

They must study hard, needn't they?

- Must chi su cam doan: => dung must

Vi du:

You mustn't come late, must you ?

- Must chi su du doan o hien tai: => dua vao dong tu theo sau must

Vi du:

He must be a very intelligent student, isn't he? ( anh ta at han la 1 hoc sinh rat thong minh, phai khong ?)

- Must chi su du doan o qua khu ( trong cong thuc must +have+ p.p) : => dung [ ] la have/has

Vi du:

You must have stolen my bike, haven't you? ( ban chac han la da lay cap xe cua toi, phai khong?)

(con tiep) 

4) Let dau cau:

Let dau cau co nhieu dang can phan biet:

- Let trong cau ru (let's ): dung shall we ?

Vi du:

Let's go out, shall we?

- Let trong cau xin phep (let us /let me ): dung will you ?

Vi du:

Let us use the telephone, will you?

Let me have some drink, will you?

- Let trong cau de nghi giup nguoi khac (let me): dung may I ?

Vi du:

Let me help you do it, may I ?

5) Cau cam than:

Lay danh tu trong cau doi thanh dai tu, [ ] dung is, am, are

Vi du:

What a beautiful dress, isn't it?

What a stupid boy, isn't he?

How intelligent you are, aren't you?

6) Cau dau co I + cac dong tu sau: think, believe, suppose, figure, assume, fancy, imagine, reckon, expect, seem, feel + menh de phu:

Lay menh de phu lam cau hoi duoi.

Vi du:

I think he will come here, won't he?

I don't believe Mary can do it, can she? ( luu y MD chinh co not thi van tinh nhu o MD phu)

Cung mau nay nhung neu chu tu khong phai la I thi lai dung menh de dau lam cau hoi duoi.

Vi du:

She thinks he will come, doesn't she?

7) Cau dau co It seems that + menh de

- Lay menh de lam cau hoi duoi.

Vi du:

It seems that you are right, aren't you?

8 ) Chu tu la menh de danh tu:

-Dung it

Vi du:

What you have said is wrong, isn't it?

Why he killed himself seems a secret, doesn't it?

Nhung loi sai thuong gap khi lam bai tap cau hoi duoi

1) Nham 's thanh is :

Ca is va has deu co cach viet rut gon la 's , tuy nhien theo thoi quen cu thay 's la cho rang do la is rut gon nen khi dem ra phia sau cho [] nguoi lam "phuc hoi" chung thanh chu is.

Cach khac phuc loi nay:

Neu nhin thay phia sau co p.p ( dong tu cot 3 hoac them ed) thi nen xem lai neu khong phai cau bi dong thi 's do chinh la has.

2) Khong nhan ra 'd :

'd la viet tac cua would hoac had, do do neu nguoi lam khong can than se lung tung va chon [] sai

Cach khac phuc loi nay:

- Neu nhin phia sau co better/ p.p thi 'd do la viet tat cua had

- Neu phia sau co rather / like / love thi 'd la viet tat cua would