Ta dựng dấu phẩy với mệnh đề quan hệ khi đại từ, trạng từ quan hệ thay cho danh từ, cụm từ đó được xỏc định (Mr Pike, my father, Hanoi, their ball, in his house ....) Mệnh đề quan hệ trong trường hợp này khụng làm nhiệm vụ xỏc định cho danh từ đằng trước (vỡ đú là danh từ đó được xỏc định) mà chỉ để cung cấp thờm thụng tin. Nếu ta bỏ mệnh đề quan hệ đi thỡ cõu vẫn cú nghĩa.
Eg 1 : - His car, which is very expensive, has just been stolen.
Eg 2 : - My younger brother , who is only 7 years old, can play the piano very
well.
Eg 3 : - Mr Hoa, whose daughter is a famous singer, has just bought a house here.
Eg 4: - I'm going to Ha noi, where my father is working.
Eg 5 : Thanh Lam, who is a famous singer , has just come here. = Thanh Lam, a famous singer , has just come here.
Notes : Đại từ quan hệ that khụng được dựng trong trường hợp này.
Exercise: Chọn từ thớch hợp trong số A, B, C hoặc D
1/ What was the name of the girl ... passport was stolen ?
2/ The bed ... I slept in was too soft.
A. which B. who C. where D. what
3/ Nora is the only person ... understands me.
A. which B. who C. whom D. what
4/ The man ... she is married to has been married twice before.
A. which B. who C. whom D. what
5/ The hotel ... we stayed was not clean.
A. that B. which C. where D. what
6/ The last time... I saw her, she looked very beautiful.
A. when B. which C. whom D. what
7/ The stories ... Tom tells are usually very funny.
A. that B. who C. when D. what
8/ Have you seen the money ... was on the table ?
A. which B. who C. whom D. what
9/ The factory ... John was working is the biggest in town.
A. which B. who C. where D. what
10/ Jim passed his driving test, ... surprised everybody.
A. that B. which C. whom D. what
11/ Do you remember the day... we first met ?
A. when B. which C. whom D. what
12/ Thank you for your letter, ... I was very happy to get.
A. that B. which C. whose D. what
13/ The reason ... he failed was obvious.
A. that B. why C. whom D. what
14/ Ann has a lot books, most of .... she hasn't read.
A. that B. who C. which D. what
15/ The mother ... son was killed in the accident was very sad.
A. that B. whose C. whom D. what
Exercise : Nối hai cõu thành một cõu sử dụng đại từ, trạng từ quan hệ
1/ The student is from China. He sits next to me. 2/ I thanked the woman. This woman had helped me. 3/ The professor is excellent. I am taking his course.
4/ I recently went back to Paris. It is still as beautiful as a pearl. 5/ Nam knows the man. We talked to him this morning.
6/ The house is very old. My grandfather used to live there.
