文档介绍：第二讲 名词性从句
突破高考重点
刷经典试题
对点跟踪检测
突破高考重点
考点一 主语从句
：连接词that，whether；连接代词what，who，whose，whatever，whichever，whoever 等；连接副词 when，where，why，how。
①When the delayed flight will take off depends much on the weather.
延迟的飞机何时起飞在很大程度上取决于天气。
②That they were in truth sisters was clear from the facial similarity between them.
从她们的面貌相似度就能清楚地看出是亲姐妹。
③What struck me most in the movie was the father's deep love for his son.
影片中最打动我的是父亲对儿子深厚的爱。
易混辨析 whether与if引导主语从句的区别：
主语从句位于主句谓语动词前，表示“是否”，只能用whether而不能用if引导；若用it作形式主语，则if与whether可互换。
④Whether we can have clean drinking water lies in what effective measures will be taken by the government about water 。
⑤It remains to be seen whether or not this idea can be put into 。
2．it作形式主语的主语从句
(1)it作形式主语，从属连词that引导的从句作真正的主语。
①It＋be＋形容词(obvious，true，natural，surprising，good，wonderful，funny，possible，likely，certain，probable等)＋that从句。
It isn't likely that I should accept such an offer as that.
我不可能接受那样的帮助。
②It＋be＋名词词组(no wonder，an honor，a good thing，a pity，no surprise等)＋that从句。
It's no wonder that he didn't want to go.
难怪他不想去。
③It＋be＋过去分词(said，reported，thought，expected，decided，announced，arranged等)＋that从句。
It is decided that the meeting has been put off till next Monday.
会议被推迟到下周一召开已经定下来了。
④It＋动词/动词短语(seem，appear，happen，matter，turn out，occur to，make no difference等)＋that从句。
It suddenly occurred to her that Joe was afraid of being alone.
她突然想到乔害怕独自一个人待着。
(2)it作形式主语，连接代词、连接副词或whether/if引导的主语从句作真正的主语。
It is uncertain what side effect the medicine will bring about, although about two thousand patients have taken it.
尽管大约两千名患者已经服用了这种药，但是它会带来什么样的副作用还不清楚。
It is not immediately clear whether/if the financial crisis will soon be over.
经济危机是否会很快结束，短时间内不会很明显。
◎题组微练(单句语法填空)
1．[2020·江苏卷]It is not a problem ________ we can win the battle; it's just a matter of time.
2．[2021·郑州市质量检测]But perhaps ________ many tourists a