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高考网汇集整理《高一英语知识点总结及重难点解析：Unit3-4句型归纳(1)》 句型归纳(1) 1. You shouldn't go rafting unless you know how to swim, and you should always wear a life jacket. 除非你会游泳，而且要一直穿着救生衣，否则就不应该去做漂流运动。 该句中的unless引导状语从句。例如：One can't learn a foreign language well unless he studies hard. unless引导的条件状语从句，一般可以与if...not...互换。还要注意unless引导的从句经常可以省略。 【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 [考查目标]状语从句。 [答案与解析]B 句子意思是“如果医生不快点工作， 这些人将不得不等一整天。”应该选unless。 2. Eco-travel is a way to find out what can be done to help animals and plants as well as people. 生态游可以找到既帮助别人.又帮助动植物的途径。 该句中的as well as是连词，连接两个并列成分。例如: He can speak German as well as French. 常见的用法: 1. well是副词，意思是“好，优秀”，as well as是形容词 同级比较结构。 2. as well as是固定短语，意思是“和”，相当于"not only … but also..."。 3. as well as连接两个并列成分作主语时，句子的谓语动词应该与前面那个名词或代词的人称或数保持一致。 4. as well as还可当作复杂介词用，意思是“除了……之外，还有”;相当于"besides，apart from"。 5. as well，是副词短语，意思是“也”，相当于“too / also”常位于句尾，与too位置相当。 6. may / might as well do sth 表示“还是……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 [考查目标] as well as连接比较状语从句。 [答案与解析]B 该句中 if not better than相当于插入语，起干扰作用，如果不予考虑，原句就变成了同级比较结构 "John plays football as well as David"。 (责任编辑：admin) |