`@Sky`

1.The boy is standing at the school gate.Do you know him?

-> Do you know the boy who is standing at the school gate?

2 The stranger is put in prison now.He broke into the bank last night 

-> The stranger who broke into the bank last night is put in prison now.

3 HaNoi will be partially cloudy. It is the capital city of Vietnam

-> HaNoi, which is the capital city of Vietnam, will be partially cloudy.

4  The girl is very good at math . I told you about her yesterday

-> The girl whom I told you about her yesterday is very good at math.

5 You sent me a gift.Thank you very much for it .

-> Thank you very much for a gift which you sent me. 

6 There wasn't any directory in the telephone box. I was phoning from this box

-> There wasn't any directory in the telephone box which I was phoning from.

7. They stayed in a beer luxurious hotel last summer 

-> The hotel which they stayed last summer is very luxurious.

8 . My brother painted a picture, and it's being shown is an exhibition.

-> The picture which my brother painted is being shown is an exhibition.

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+ Grammar: Mệnh đề quan hệ

`-` Who: (ai) dùng để chỉ người, làm chủ từ

`-` Whom: (ai) dùng để chỉ người, làm túc từ

`-` Where: (ở đâu) chỉ nơi chốn

`-`Which: (cái mà) dùng để chỉ vật

Lưu ý: trong mệnh đề quan hệ không xác định, "that" có thể thay cho which, who, whom.

`1.` Do you know the boy who is standing at the school gate?

`2.` The stranger who broke into the bank last night is now put in prison.

`3.` Hanoi, which is the capital city of Vietnam, will be partially cloudy.

`4.` The girl whom I told you about yesterday is very good at math.

`5.` Thank you very much for the gift which you sent me.

`6.` There wasn't any directory in the telephone box from which I was phoning.

`7.` The hotel that they stayed in last summer was very luxurious.

`8.` The picture which my brother painted is being shown in an exhibition.

`-----------------`

*Đại từ quan hệ trong mênh đề quan hệ:

`-` who: được dùng làm chủ ngữ hoặc tân ngữ thay thé cho danh từ chỉ người.

`-` whom: có thể làm tân ngữ thay thế cho danh từ chỉ người, nhưng whom thì thường dùng trong lối văn trang trọng.

`-` which: được dùng làm tân ngữ hoặc chủ ngữ thay thế cho danh từ chỉ vật, đồ vật, sự việc.

`-` that: được dùng thay thế cho cả danh từ chỉ người và danh từ chỉ vật, that có thể thay cho who, whom, which trong mệnh đề quan hệ xác định.