同义句变换·利用语态改写

同义句变换·利用语态改写

通过改变主语，主动语态与被动语态之间可进行同义句转换，特别要注意时态、情态动词的用法。如

1. People grow rice in the south of China.

Rice_________ _________ in the south of China.

【答案】is grown。rice作主语，助动词用一般现在时的单数形式is。

2. Everyone should give back his library books on time.

Library books should  _________ _________ on time.

【答案】be given back。被动句中含有情态动词should，因此助动词用be。

3. It is widely accepted that more people use computers in the world today.

Computers _________ widely _________ in the world today.

【答案】are; used。computers是复数名词作主语，助动词用are，且句子用被动语态。

4. We must keep the noise level under 50dbs(分贝).

The noise level must _________ _________ under 50dbs.

【答案】be kept。被动句中含情态动词must，因此助动词用be。

5. Do they grow rice in autumn?

 rice  in autumn?

【答案】Is; grown。疑问句的助动词置于句首。

6. We call maths the language of science.

Maths _________ _________ the language of science.

【答案】is called。主语maths虽然是以s结尾，但并不是名词的复数，因此助动词仍用单数is。