1. George Beauchamp, who was an American inventor, invented the electric guitar in 1932.

(George Beauchamp, một nhà phát minh người Mỹ, đã phát minh ra đàn guitar điện vào năm 1932.)

2. Philo T. Farnsworth, who was the first television's inventor, invented it in 1927.

(Philo T. Farnsworth, người phát minh ra tivi đầu tiên, đã phát minh ra nó vào năm 1927.)

3. Tom Kilburn, who developed the first software in 1948, worked for the University of Manchester.

(Tom Kilburn, người phát triển phần mềm đầu tiên vào năm 1948, làm việc cho Đại học Manchester.)

4. Edward Jenner, who created the first vaccine in 1796, was a country doctor in England.

(Edward Jenner, người đã tạo ra vắc-xin đầu tiên vào năm 1796, là một bác sĩ nông thôn ở Anh.)

1. a doctor – A doctor is a person who work in hospital.

(Một bác sĩ là một người làm trong bệnh viện.)

2. an actor - An actor is a person whose job is to act in a movie.

(Một diễn viên là một người đóng vai trong một bộ phim.)

3. a school – A school is a place where students study.

(Một ngôi trường là nơi học sinh học.)

4. your ideas – Your ideas are something that is quite interesting.

(Ý tưởng của bạn là thứ gì đó thật thú vị.)

a. In non-defining relative clauses, we use who, which, where and whose, but we do not use that.

(Trong mệnh đề quan hệ không xác định, ta dùng, who, which, where và whose, và chúng ta không dùng that.)

b. A non-defining relative clause:

(Một mệnh đề quan hệ không xác định là:)

comes immediately (1) after a noun and gives us information about that noun.

(theo ngay sau một danh từ và cho biết thông tin về danh từ đó.)

adds extra information to the sentence; the sentence (2) makes sense without it.

(thêm thông tin vào câu; câu vẫn có nghĩa khi không có nó.)

(3) has a comma at the start. It has a comma or a full stop at the end.

(có một dấu phẩy ngay lúc bắt đầu. Có một dấu chấm hoặc dấu phẩy vào cuối câu.)

1. I met a boy whose brother is in my class.

(Tôi đã gặp cậu bé, anh trai của cậu ấy học lớp tôi.)

2. He's the man who/ that I saw on the train.

(Anh ta là người mà tôi đã gặp trên tàu.)

3. Is that the dictionary which/ that you bought yesterday?

(Đây có phải cuốn từ điển mà bạn mua hôm qua không?)

4. Show me the computer which/ that you got for your birthday. 

(Cho tôi xem cái máy tính mà bạn nhận được vào dịp sinh nhật ấy.)

5. Is that the cafe where you worked last summer? 

(Đó có phải quán cafe nơi mà bạn làm việc mùa hè năm ngoái?)

6. New Year's Day is the day which/ that comes after New Year's Eve. 

(Ngày Tết là ngày sau đêm giao thừa.)

1. The house has been built in the forest. It doesn’t have electricity.

___The house which has been built in the forest doesn’t have electricity____________

2. Do you know the man? He is coming towards us.

_____________Do you know the man who is coming towards us?______________

3. I sent my parents some postcards. They were not so expensive.

____________I sent my parents some postcards which were not so expensive_________________________________________________

4. I come from a city. The city is located by the sea.

_________I come from a city which is located by the sea____________

5. The soup was so delicious. I had it for lunch.

___The soup that I had for lunch was so delicious___

6. The man is her father. You met him last week.

➔ ___________The man whom you met last week is her father____________________________.

7. Carta has a sister. Her sister’s name is Juma.

➔ ____________Carta has a sister whose nam is Juma___________________________.

8. Show me the new hats. You bought them last night.

➔ __________Show me the new hats which you bought last night_____________________________.

9. Huyen likes the blue T-shirt. My sister is wearing it.

➔ _____________Huyen likes the blue T-shirt which my sister is wearing__________________________.

10. That is a company. It produces ring.

➔ _______That is a company which produces ring________________________________.

11. The children were attracted by the show. It was performed so many.

➔ _____________The children were attracted by the show which was performed so many__________________________.

12. Linda bought a new phone yesterday. I can use it to send and receive message.

➔ __________Linda bought a new phone yesterday which I can use to send and receive message_____________________________.

13. Tet is a festival. Tet often happens in late January or early February.

➔ ________Tet is a festival which often happens in late January or early February_______________________________.

14. My best friend can compose songs. Ly sings folk songs very well.

➔ _______My best friend can compose songs which Ly sings very well________________________________.

15. Cuong is the boy. He is giving my mom a gift.

➔ ______________Cuong is the boy who is giving my mom a gift_________________________.

1. The house has been built in the forest. It doesn’t have electricity.

➜ The house which has been built in the forest doesn't have electricity.

2. Do you know the man? He is coming towards us.

➜ Do you know the man who is coming towards us?

3. I sent my parents some postcards. They were not so expensive.

➜ I sent my parents some postcards which were not so expensive.

4. I come from a city. The city is located by the sea.

➜ I come from a city which is located by the sea.

5. The soup was so delicious. I had it for lunch.

➜ The soup which i had for lunch was so delicious.

6. The man is her father. You met him last week.

➔ The man who you met last week is her father.

7. Carta has a sister. Her sister’s name is Juma.

➔ Carta has a sister whose name is Juma.

8. Show me the new hats. You bought them last night.

➔ Show me the new hats which you brought them last night.

9. Huyen likes the blue T-shirt. My sister is wearing it.

➔ Huyen likes the blue T-shirt which my sister is wearing.

10. That is a company. It produces ring.

➔ That is a company which produces ring.

11. The children were attracted by the show. It was performed so many.

➔ The children were attracted by the show which was performed so many.

12. Linda bought a new phone yesterday. I can use it to send and receive message.

➔ Linda bought a new phone which can be used to send and receive message yesterday.

13. Tet is a festival. Tet often happens in late January or early February.

➔ Tet is a festival which often happens in late January or early February.

14. My best friend can compose songs. Ly sings folk songs very well.

➔ _______________________________________.

15. Cuong is the boy. He is giving my mom a gift.

➔ Cuong is the boy who is giving my mom a gift.

1. The house which has been built in the forest doesn’t have electricity.

2. Do you know the man who is coming towards us?

3. I sent my parents some postcards which were not so expensive.

4. I come from a city which is located by the sea.

5. The soup that/ which I had for lunch was so delicious.

6The man whom you met last week is her father.

7. Carta has a sister whose nam is Juma.

8 Show me the new hats which you bought last night.

9. Huyen likes the blue T-shirt which my sister is wearing.

10. That is a company which produces ring.

11. The children were attracted by the show which was performed so many.

12. Linda bought a new phone yesterday which I can use to send and receive message.

13. Tet is a festival which often happens in late January or early February.

14. My best friend can compose songs which Ly sings very well.

15 Cuong is the boy who is giving my mom a gift.

16 The singer who was recovering from flu had to cancel her concert.

17 The doctor to whom you spoke yesterday is not here today.