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The question is whether this idea can be put into practice.问题是这一想法是否能付 诸实践。 Everything depends on whether we have enough money.一切都取决于我们是否有 足够的钱。 用法归纳 (1)if/whether引导的名词性从句是由一般疑问句或选择疑问句转化而来的, whether与if表示“⑤ ”,只起连接作用,引导从句,在从句中不作任何成 分。 (2)whether和if有时可互换,但在下列情况下,只可用whether: a.引导⑥ 从句并放在句首时。 b.引导⑦ 从句和同位语从句时。 c.引导的从句作介词的⑧ 语时。 d.后紧跟or not时。 是否 主语 表语 宾 3.连接代词who、whom、whose、what、which等和连接副词where、why、 when、how等的用法 情景导学 Do you know whom they are looking for?你知道他们在找谁吗? I don’t know who did it.我不知道这件事是谁做的。 When we shall meet again is unknown.我们什么时候会再见是未知的。 用法归纳 连接代词、连接副词引导的名词性从句由特殊疑问句转化而来。它们的特点是: (1)连接代词、连接副词保留自己的疑问含义。 (2)连接代词在从句中充当句子成分,如⑨ 、⑩ 、定语,连接副词在 从句中作 。 (3)连接代词、连接副词引导的从句一律用 语序,不能用疑问句语序。 主语 宾语 状语 陈述句 4.whatever、whoever、whenever的用法 情景导学 I will just say whatever comes into my mind.我想到什么就会说什么。 Whoever breaks the rules will be punished.任何违反规定的人都会受到惩罚。 用法归纳 whatever、whoever、whenever可引导 从句、宾语从句和表语从句,并在 从句中作 、宾语、表语等。在此用法中whatever、whoever等在从句中 通常不含疑问意义。whatever=anything that; whoever=anyone who。 主语 主语 5. it作形式主语或形式宾语的名词性从句 情景导学 It is quite clear that the whole project is doomed to failure. It is not yet decided who will do that job. It is still unknown which team will win the match. I think it best that you should stay here. I like it when people are open and straight. We need to see to it that the guests are satisfied with us. 用法归纳 (1)that引导主语从句时,通常用 作形式主语,而将that从句置于句末。 (2)which、who、what等引导主语从句且从句较长时也常用 作形式主 语,而将真正的主语置于句末。 (3)动词think、find、feel、consider、make等后面有 时,常使用it 作形式宾语,而将真正的宾语移至句末。 (4)表示喜爱、憎恶等感情的动词enjoy、hate、love、like、dislike和表示认为的 词take、have以及表示确保的see to后不能直接跟宾语从句,需用it作形式宾语,再 跟宾语从句。 it it 宾语补足语 1.The question is we can put what we have learned into practice. 2. remains to be seen whether a fast solution can be found. 3.She asked me I had returned the books to the library, and I admitted that I hadn’t. 4.It is estimated extreme weather conditions have endangered the lives of millions of African children. 1.how 考查表语从句。句意:问题是我们如何把学到的东西付诸实践。 we can put what we have lea