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同義句變換·利用語(yǔ)態(tài)改寫
通過改變主語(yǔ)，主動(dòng)語(yǔ)態(tài)與被動(dòng)語(yǔ)態(tài)之間可進(jìn)行同義句轉(zhuǎn)換，特別要注意時(shí)態(tài)、情態(tài)動(dòng)詞的用法。如：
1. People grow rice in the south of China.
Rice_________ _________ in the south of China.
【答案】is grown。rice作主語(yǔ)，助動(dòng)詞用一般現(xiàn)在時(shí)的單數(shù)形式is。
2. Everyone should give back his library books on time.
Library books should _________ _________ on time.
【答案】be given back。被動(dòng)句中含有情態(tài)動(dòng)詞should，因此助動(dòng)詞用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是復(fù)數(shù)名詞作主語(yǔ)，助動(dòng)詞用are，且句子用被動(dòng)語(yǔ)態(tài)。
4. We must keep the noise level under 50dbs(分貝).
The noise level must _________ _________ under 50dbs.
【答案】be kept。被動(dòng)句中含情態(tài)動(dòng)詞must，因此助動(dòng)詞用be。
5. Do they grow rice in autumn?
rice in autumn?
【答案】Is; grown。不可數(shù)名詞rice作主語(yǔ), 助動(dòng)詞用單數(shù)is，一般疑問句的助動(dòng)詞置于句首。
6. We call maths the language of science.
Maths _________ _________ the language of science.
【答案】is called。主語(yǔ)maths雖然是以s結(jié)尾，但并不是名詞的復(fù)數(shù)，因此助動(dòng)詞仍用單數(shù)is。
同義句變換·利用反義詞改寫
用反義詞或詞組加上否定詞表達(dá)與原句相同的意思，主要考查學(xué)生對(duì)反義詞、詞組的積累和換位思維的能力。如：
1. The boy lent a story-book to Tom just now.
Tom _________ a story-book _________ the boy just now.
【答案】borrowed; from。borrow…from意為“從……借來”;而lend…to意為“向……借出”，兩個(gè)詞組正好為一組反義詞組，當(dāng)句子的主語(yǔ)變化時(shí)，兩個(gè)詞組可以進(jìn)行互換。
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