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[例句]
Mother insists that Tom (should) go to bed at nine o'clock.(宾语从句)
We suggested that the meeting (should) be held at once.
It was required that the crops (should) be harvested at once.(主语从句)
The suggestion that he (should) be invited was rejected.(同位语从句)
That is their demand that their wages (should) be increased.(表语从句)
[注意1]
advice, suggestion, order, demand, proposal, request, desire, command, decision, requirement等名词引导的同位语从句或表语从句，谓语动词用 (should) + 动词原形。
[注意2]
It's suggested/ advised/ demanded/ordered/requested/proposed/required/desired等结构后的主语从句中，谓语动词用(should) + 动词原形。
[注意3]suggest意思是"表明，暗示;说明"时;insist意思是"坚持观点，坚持看法"时，句子不能用虚拟语气。
[例句]
He insisted that he was innocent.=He insisted on his innocence. 他坚持说自己是无辜的。
He insisted that he had never done wrong. 他坚持说没有做错事情。
Are you suggesting that I'm not suited for the job? 你是在暗示说我不适合做那项工作?
The look on his face suggested that the teacher was quite satisfied with the result. 脸上的表情说明老师对结果感到满意。
句型33
It is necessary/important/natural/impossible/essential(基本的)等结构后的主语从句中要用虚拟语气，即主语+(should)+动词原形
[例句]
It's necessary that Tom take the exam first. Tom有必要先参加考试。
With the society developing very fast, it's quite necessary/important that we (should) have a good knowledge of English and computer. 随着社会的快速发展，我们有必要精通英语和电脑。
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