If my father were here he would be very happy,----?为什么用would

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If my father were here he would be very happy,----?为什么用wouldn't he

（1）If my father were here he would be very happy,wouldn't he?译文：要是我爸爸在这儿的话,他一定会很开心.不是吗?
（2）前半部分是一个复合句,前面是if引导的条件状语从句,If my father were here .后面是主句he would be very happy.最后是反意疑问句,wouldn't he?反意疑问句的谓语要与前面主句的谓语动词一致,并用其否定形式.
（3）这一句话是虚拟语气,表示与目前的事实相反的假设.其实我的父亲不在这儿.所以从句用过去式,不能用was,只能用were.这是约定俗成的,没有道理可讲.主句是would+动词原形.
希望对你有所帮助.
祝你进步.
再问：主句和从句怎么区分啊
再答：（1）从引导词方面区分：从句前有引导词，what,that,how,when,if,after,as soon as,because,though等等。主句前没有引导词。（2）从位置上区分。有主句和从句的句子又叫复合句。如果一个复合句的一个句子和另一个句子之间有逗号隔开，那么前面一定是从句，后面是主句。如果没有逗号，那么前面一定是主句，后面一定是从句。（3）复合句中只有一个主句，可以有多个从句。有多个从句时，每个从句前都会有一个引导词的。希望对你有所帮助。祝你进步。

If my father were here he would be very happy,----?为什么用would 初中英语 33.If your father __this news ,he would be very happy if he were here,everything would be all right.all would能换成sh if he were here ,that's very good 这句话是虚拟语气,可主句为什么不用would +动词 Even if he were here,he would not be able to help us If he were here,he would help me now.If he asked me,I would if he were here i would beat him 为什么不是 if he was here 不是过去式吗 If she were here , she would ______ my sadness If father ___(be) alive,He would be horrified.答案是were那么这句话是什 Mr Zhang isn’t here. If he ____here, my parents would be hap If my brother lived here today,he would be surprised by what Every time chat and he would be very happy,