2020-11-18 15:43:22
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语法之所以让孩子记不住，是因为内容真的太多了，光大的语法知识就有25个，而在每个语法知识点之下又有7-8个小的语法知识点。如果我们把PET语法知识按照要点罗列在一张A4纸上，那么15页纸都不够，并且罗列知识点的方式丢失了语法本身具备的逻辑关系。
虚拟语气在各种从句的应用
（１） 在主语从句中用来表示惊奇、惋惜、理应如此等，其谓语形式是"should(可省) ＋动词原形"，常用于以下三种句型中。
句型一：It is necessary (important, natural, strange, etc) that…
句型二：It is a pity (a shame, no wonder, etc) that…
句型三：It is suggested (requested, proposed, desired, etc) that… 如：
It is strange that he (should) have done that.
It is a pity that he (should) be so careless.
It is requested that we (should) be so careless.
（２） 在宾语从句中用于suggest, propose, move, insist, desire, demand, request, order, command等动词后的宾语从句中，表间接的命令和建议。其谓语形式是"(should)+动词原形"。如：
I suggest that we (should) go swimming.
（３） 在表语从句中，表示间接的命令，要求、请求、建议、决定等，主句中的主语通常是suggestion, proposal, request, orders, idea等。从句谓语形式是"(should)＋动词原形"。如：
His suggestion is that we (should) leave at once.
（４） 在同位语从句中，谓语形式是"(should)＋动词原形"。如：We received order that the work be done at once.
（５） 在It is time that…句型中，其谓语动词形式是"动词的过去式"或 "should ＋动词原形",should不可省。如：
It's time (that) we went ( should go) to school.
II． 例题 例１ We had hoped that he ____ longer.
A stays B have stayed
C stayed D would stay
解析：该题正确答案为Ｄ。had hoped表示"本希望"，同样用法的动词还有think, expect等，后面的句子需用虚拟语气
例２ "Mary wants to see you today"."I would rather she ____ tomorrow than today."
A comes B came
C should come D will come
解析：该题正确答案为Ｂ。would rather后面的从句需用虚拟语气，用动词过去时表示。
例３ Had she been older, she ____ it better.
A had done B might have done
C might do D would do
解析：Had she been older = If she had been old. 故该题正确答案为Ｂ。
以上就是小编为大家整理的关于PET英语语法讲解之虚拟语气在各种从句的应用，希望对大家有所帮助。更多PET机经下载、PET官方网站等问题可以咨询我们。
