有必要马上派他到那里去。

　　②It be＋过去分词(said, thought, believed, supposed, reported ...)＋that从句。

　　It is reported that donating blood does good to health.

　　据报道，献血对健康有好处。

　　③It＋不及物动词(seem, occur, happen ...)＋that从句。

　　Yes! It occurred to me that the noodles you cooked tasted good.

　　对！我想起来了，你煮的面条味道还真不错！

　　④It be＋名词短语(a pity, a fact, a wonder, an honour, no wonder ...)＋that从句。

　　It's a good idea that we will go skating this Sunday.

　　本周日我们去滑冰，这是个好主意。

　　【关键一点】　在句型“It is strange/natural/important/necessary/essential ...＋that从句”中，从句要用虚拟语气，即从句谓语动词为“should＋动词原形”，should可以省略。

　　【对点练习】

　　句型转换

　　①It is obvious to everyone that the child has been badly treated.

　　①－1 The child has been badly treated, which is obvious to everyone.(定语从句)

　　①－2 What is obvious to everyone is that the child has been badly treated.(主语从句)

　　【真题印证】

　　②(2017·陕西高考改编)It_remains_to_be_seen_whether the newly formed committee's policy can be put into practice.(remain)

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