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高一英語學(xué)習(xí):三四單元重難點(diǎn)句型歸納一
☆句型歸納☆
1. You shouldn't go rafting unless you know how to swim, and you should always wear a life jacket. 除非你會游泳,而且要一直穿著救生衣,否則就不應(yīng)該去做漂流運(yùn)動。
該句中的unless引導(dǎo)狀語從句。例如:One can't learn a foreign language well unless he studies hard.
unless引導(dǎo)的條件狀語從句,一般可以與if...not...互換。還要注意unless引導(dǎo)的從句經(jīng)?梢允÷浴
【考例】(200l北京春招)The men will have to wait all day ____ the doctor works faster.
A. if B. unless C. whether D. that
[考查目標(biāo)]狀語從句。
[答案與解析]B 句子意思是“如果醫(yī)生不快點(diǎn)工作,
這些人將不得不等一整天。”應(yīng)該選unless。
2. Eco-travel is a way to find out what can be done to help animals and plants as well as people. 生態(tài)游可以找到既幫助別人.又幫助動植物的途徑。
該句中的as well as是連詞,連接兩個并列成分。例如: He can speak German as well as French.
常見的用法:
1. well是副詞,意思是“好,優(yōu)秀”,as well as是形容詞 同級比較結(jié)構(gòu)。
2. as well as是固定短語,意思是“和”,相當(dāng)于"not only … but also..."。
3. as well as連接兩個并列成分作主語時(shí),句子的謂語動詞應(yīng)該與前面那個名詞或代詞的人稱或數(shù)保持一致。
4. as well as還可當(dāng)作復(fù)雜介詞用,意思是“除了……之外,還有”;相當(dāng)于"besides,apart from"。
5. as well,是副詞短語,意思是“也”,相當(dāng)于“too / also”常位于句尾,與too位置相當(dāng)。
6. may / might as well do sth 表示“還是……的好”。
【考例】(NMET 1994) John plays football ____, if not better than David.
A. as well B. as well as C. so well D. so well as
[考查目標(biāo)] as well as連接比較狀語從句。
[答案與解析]B 該句中 if not better than相當(dāng)于插入語,起干擾作用,如果不予考慮,原句就變成了同級比較結(jié)構(gòu) "John plays football as well as David"。
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