1 Combine the sentences to write single sentences containing defining or non-defining relative clauses.

1. My boss speaks Mandarin Chinese. He’s British but grew up in Beijing.

2. She’s the new girl. I really want to meet her.

3. This is a great website. You can download music here.

4. The young entrepreneur started a computer business. I met him on a train.

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1. My boss, who is British but grew up in Beijing, speaks Mandarin Chinese. (defining relative clause)

Explanation: In this sentence, we are combining two sentences to provide additional information about the boss. The relative pronoun "who" is used to introduce the relative clause. The phrase "who is British but grew up in Beijing" provides defining information about the boss.

2. She’s the new girl, whom I really want to meet. (defining or non-defining relative clause)

Explanation: In this sentence, we are combining two sentences to give more information about the new girl. The relative pronoun "whom" is used to introduce the relative clause. Whether it is defining or non-defining depends on the context. If there is more than one new girl, then it would be defining as it specifies which girl the speaker wants to meet. If there is only one new girl, it would be non-defining because it simply adds extra information about her.

3. This is a great website where you can download music. (defining relative clause)

Explanation: In this sentence, we are combining two sentences to show the purpose or function of the website. The relative pronoun "where" is used to introduce the relative clause. The phrase "where you can download music" provides defining information about the website.

4. The young entrepreneur, whom I met on a train, started a computer business. (defining or non-defining relative clause)

Explanation: In this sentence, we are combining two sentences to provide additional information about the young entrepreneur. The relative pronoun "whom" is used to introduce the relative clause. Whether it is defining or non-defining depends on the context. If there is more than one young entrepreneur, then it would be defining as it specifies which entrepreneur the speaker met. If there is only one young entrepreneur, it would be non-defining because it simply adds extra information about him.