i am very happy to be here 为什么是to be here```用IS不行吗··是因为一个句子里不能出现两个be吗

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i am very happy to be here 为什么是to be here```用IS不行吗··是因为一个句子里不能出现两个be吗
i am very happy to be here 为什么是to be here```
用IS不行吗··是因为一个句子里不能出现两个be吗

i am very happy to be here 为什么是to be here```用IS不行吗··是因为一个句子里不能出现两个be吗
英语句子里,谓语动词只能有一个,这个句子的中心句是：I am very happy 其中am very happy是系表结构充当谓语,to be here这里是不定式短语作原因状语,所以不能用is,否则就像楼主说的,出现了两个谓语动词了.
be happy to do sth这是一个很常用的表达方法,意思是：很高兴做某事

to be here 中be不是系动词不能用is 代替

to be 这是个词组，不能用其它词替换。

这个句子的主要结构是：主语+系动词is +表语happy,后面的to be here 是不定式做原因状语，不定式的构成就是to加动词原型，am is are 的原型都是be

be happy to do ......
to后面接动词原形，本来是am，因为有to所以用am的原形be

be happy to do something 很高兴在这里，

I am very happy to have you! I am very happy to work here I am very happy i am very happy to have chance to be I am feeling very happy I am very happy to have you with me I am very happy to meet you Thank you Darling .I am very happy to be your wife . I am very happy because i can enjoy doing _____iLove to do A what B that 应该选什么呢 I am very happy 对very happy 提问 Baby,you must be very very happy.I am willing with mine all,to trade you to be happy! 英语翻译I want to let you know that I am very happy to get your email. 英语翻译have you,i am very happy I am very happy this holiday. i am very happy today句子成分划分 Have you,I am very happy i am very happy with you I AM VERY HAPPY BEAUSE FOR YOU