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二、完形填空??颊Z法解讀:what從句:① what只能引導(dǎo)主、賓、表語從句;② what不能引導(dǎo)定語從句和同位語從句,也就是說what前不能有名詞;③ what后面的從句通常不完整。相關(guān)知識(shí):① 凡是從句部分不完整的,98%是定語從句,1%是what從句,1%是省略式狀語從句。②同位語從句、表語從句引導(dǎo)詞只能用that,不能用which;只能用weather,不能用if。as引導(dǎo)定語從句:① as作關(guān)系代詞引導(dǎo)定語從句,先行詞可以是名詞,也可以是句子;例:He is honest, as we know.② as引導(dǎo)定語從句,位置靈活:例:As we know, he is honest.③ as和which的區(qū)別:a.在引導(dǎo)限制性定語從句時(shí),as只能用在一些固定結(jié)構(gòu)中,例如:as … as、so … as、such … as、the same … as例:He has many books, which are displayed here.He has as many books as are displayed here.b. 在引導(dǎo)非限制性定語從句時(shí),用as表示從句與從句是一致關(guān)系,而用which則表示關(guān)系不一致。例:He has been married, as we expect.He has been married, which is unexpected.than引導(dǎo)定語從句:① than作為關(guān)系代詞引導(dǎo)定語從句;② 主句要有比較級(jí);③ than后面從句缺主語;④ 引導(dǎo)定語從句時(shí),對(duì)比成分不明顯,而引導(dǎo)比較狀語從句時(shí),對(duì)比成分很明顯;例:I am taller than you.He drinks more wine than is good for his health.如果主句有最高級(jí),則必須用that。but引導(dǎo)定語從句:① but作關(guān)系代詞引導(dǎo)定語從句;② 主句要有否定成分;③ but相當(dāng)于that … not或who … not。例:There is no one but errs. = There is no one that doesn’t err.