Unit 15: Space Conquest
Grammar 1: TAG QUESTIONS ( Câu hỏi đuôi)
* Structure S +V (affirmative) + …, Aux- Negative + S?
S +V Negative + …, Aux- (affirmative)+ S?
* Examples:
Affirmative statement Negative statement
- You have a brother, don't you?
- Mr Minh has been to Hue, hasn't he?
- We have finished, haven't we?
- Lan will come next week, won't she?
- We don't eat dinner at home, do we?
- It isn't raining, is it?
- You don't like coffee, do you?
- They will not help, will they?
* Some special cases :
a) If the main clause is " I am" , tag question must be "aren't I?"
EX: I am coming here ,aren't I?
b) If the main clause have " let's" ,tag question must be " shall we?"
EX: - Let's go to the movies, shall we?
c) If the main clause is request ,tag question must be " will you?"
EX: - Open the window, will you?
d) If the main clause is invitation ,tag question must be "won't you?"
EX: - Take your seat, won't you?
e) If the main clause have: " seldom, rarely, hardly, no, without, never,.........." ,tag question
must be affirmation.
EX: -He never goes to school late ,does he?
* Notes : Grammar :
S + V + O , [ ] + ĐẠI TỪ ?
Trong đó :
Đại từ : Lấy chủ từ câu đầu đổi thành đại từ
Đàn ông ---> he

There'll be plenty for everyone, ..?
Grammar 2: Could/ be able to + Vinf
* Chỉ khả năng, năng lực ở hiện tại : can, be able to ; ở quá khứ could, was/ were able to
Tuy nhiên ta thờng dùng can/ could trong trờng hợp nài.
Ex: 1. He could/ was able to run very fast when he was a boy.
2. We were able to/ could get tickets for the match yesterday.
3. When I was young I could/ was able to climb any tree in the forest.
4. In those day we had a car, so we could/ were able to travel very easily.
* Trong câu có các động từ: see, hear, smell, taste, feel, remember, understand Dùng can/
could
Ex: When we went into the house, we could smell burning.
* Trong câu phủ định dùng cả hai đều đúng.
Ex: I couldn t come last night, sorry. OR I wasn t able to come last night, sorry.
* Diễn đạt những việc làm đợc vào một dịp nào đó, ta dùng be able to chứ ko ding can/
could
Ex: The fire spread through the building quickly, but everybody was able to escape.
Exercise 2: Complete these sentences with could, couldnt or was/ were able to:
A girl fell into the river but fortunately we rescue her.
I walk when I was less than a year old.
My grandfather walk without any help last night.
you understand what he was saying?
My grandmother speak Spanish.
Suddenly all the lights went out. We see a thing.
The computer went wrong, but luckily Emma put it right again.
There was a big party last night. You hear the music half a mile away.
I learnt to read music as a child. I read it when I was five.
People heard warnings about the food, and they move out in time.
The train was full. I find a seat anywhere.
Mrs Carter put out the fire before the house burnt down.
I looked everywhere for the books, but I find it.
5. People believe that nuclear power stations are in danger.6. people know that cars pollute the environment.7. People think that shes traveling in Asia.Exercise 4: Change into passive in two ways:
It is said that C.Columbus discovered American.
--> C.Columbus is said ...................................
 ……………………………………………………………………………………
2. It is said that many people are homeless because of the flood.
--> Many people ............................................
 ……………………………………………………………………………………
3. It is known that the Prime Minister is in favor of the new law.
--> The Prime Minister ...................................
 ……………………………………………………………………………………
4. It is expected that the US President will lose the election.
--> The US President........................................
 ……………………………………………………………………………………
5. It is believed that the thieves got in through the kitchen window.
--> The thieves........................................... ..
 ……………………………………………………………………………………
6.It is found that she drove through the town at 50 miles an hour.
--> She .........................................
 ……………………………………………………………………………………