专题八名词性从句that, whether与 if 引导名词性从句的区别—— 考题尝试 (单句语法填空 )1．(2016 ·北京高考改编 )The most pleasant thing of the rainy season is that one can be entirely free from dust.2．(2013 ·全国卷Ⅰ改编 )I am wondering whether you can pick him up at the airport.3．(2015 ·北京高考改编 )I truly believe that beauty comes from within.4．(2012 ·浙江高考改编 )I made a promise to myself that this year, my first year in high school, would be different.—— 规则点拨当名词性从句主干齐全，又不缺少状语时， 用连接词引导。 连接词有 that, whether 和 if 。1．that: that 连接名词性从句，只起连接作用，不在从句中作成分。在宾语从句中可以省略。The teacher informed us (that ) we would have a test the next day. 老师告知我们第二天进行测试。2．if 和 whether ：有“是否”的含义，表示一般疑问。主语从句和表语从句中只能用whether 不能用 if 。if 和 whether 也不在从句中作成分，只起连接作用。The trouble is whether he can come on time. 麻烦是他是否能按时来。[注意事项 ]1．在下列情况下一般只能用whether，不用 if ：(1)引导主语从句并在句首时；(2)引导表语从句时；(3)引导从句作介词宾语时；(4)从句后有 “ or not”时；(5)后接动词不定式时。2．that 引导主语从句时，常用it 作形式主语，常见句型有：(1)it ＋be＋形容词 (如： obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, evident, clear, apparent 等)＋that 从句。(2)it ＋be＋名词 (如：no wonder, an honour, a good thing, a pity, no surprise 等)＋that 从句。(3)it ＋be＋过去分词(如：said, reported, thought, estimated, expected, decided, announced, arranged, recognized 等 )＋that 从句。类似句型还有：It cannot be denied that ... /It must be admitted that ...(4)it ＋动词 (如： seem, appear, happen, occur to sb., doesn' t matter, make no difference 等)＋that 从句。—— 对点演练 (单句语法填空 )1．That he will come to t...
