1.Hỏi về mục đích
- why..............? tại sao.........?
Why do you want to learn English?
- what ...........for? để làm gì..........?
what did you buy it for?
- what is the purpose of......? Mục đích của.......là gì?
what is the purpose of her visit?
2. Diễn tả mục đích
a. For + Noun ( phrase) : để
He has gone out for dinner
I went to the supermarket for some foods
b. To do.....: để
He has gone out to eat dinner
Lưu ý : She has been to the post office for buying stamp ---------> câu này sai
She has been to the post office to buy stamp -----------> câu này đúng
Tuy nhiên có trường hợp ngoại lệ
To be used for doing / to do
A knife is used for cutting
A knife is used to cut ( cả hai câu đều đúng)
c. In order to do = so as to do
He finished work early .He wanted to see the football match.
------> H e finished work early in order to see the football match
+ In order not to do = so as not to do
We whisper .We didn't want to disturb him.
-------> So as not to disturrb him, we whisper
+ In order for sb/ sth to do : Để cho ai đó / cái gì làm gì
In order for the lift to work you must press this button
d. with a view to + V_ing : để làm gì , với ý định làm gì
With a view to preparing this report, I will visit a number of venues and attended quite a lot of games
e. So that / In order that + S__V ( can , could , may , might , will, would)
I left the letter on the table . I wanted him to see it when he came in
= I left the letter on the table so that he could see it when he came in
We were speaking quietly .We didn't want anyone to hear us
= We were speaking quietly in order that no one could hear it
f. For fear that S_V ( should): vì sợ rằng
I am telling you this for fear that you should make a mistake