适用该句型的过去分词主要有: said, reported, announced, hoped, thought, told, believed, expected, decided, suggested, known等。
It is hoped that one day they will have enough animals to set them free.
注意: 该句型的过去分词是suggested时, 从句应为(should+)动词原形。
◇It + be +名词(词组)+ that从句
适用该句型的名词(词组)有: a pity, an honor, a good thing, a fact, a surprise, good news, one’s duty等。
It is a fact that English is being accepted as an international language.
◇It +seems/appears/happens的适当形式+that从句。
该句型常可以转换成含不定式的简单句。
It seems that there is a big waste pipe coming down from the town.
→There seems to be a big waste pipe coming down from the town.
◇It doesn’t matter(It’s no wonder; It doesn’t make much difference等)+ when/where/which/whether等从句。
They are all classmates. It is no wonder they should help each other with their studies.
18.【解析】选B。考查主语从句。句意: 尽管大约有两千名病人已经服用了这种药物, 但是它会产生什么样的副作用现在还不能确定。根据句意可知应该选择B项引导主语从句。what在这里实际上是作为形容词来修饰后面的“side effect副作用”。一起作从句中bring about的宾语。
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