He is very happy to do his homework.这句话既有be动词is,又有助动词do,并且在啥情况下可以有be动词和助动词同用?

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He is very happy to do his homework.这句话既有be动词is,又有助动词do,并且在啥情况下可以有be动词和助动词同用?
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He is very happy to do his homework.这句话既有be动词is,又有助动词do,并且在啥情况下可以有be动词和助动词同用?
He is very happy to do his homework.这句话既有be动词is,又有助动词do,
并且在啥情况下可以有be动词和助动词同用?

He is very happy to do his homework.这句话既有be动词is,又有助动词do,并且在啥情况下可以有be动词和助动词同用?
这是固定的句型 be + 形容词 + to do sth.表示做.感到.
I am glad to meet you.我很高兴见到你.
I am shocked to hear the news.听到这个消息我很震惊.
有问题再问吧

对的
be happy to do sth
这是固定用法，不是一个句子有2个谓语

这句话没错。
1.英语中有许多形容词可以用于：be +adj.+to do 这一句型的，如：be glad to do;be afraid to do;be happy to do; be sure to do 等。
2.do 在这里不是助动词，而是实意动词。
建议：找一本语法书看看，对语法有个初步了解。

这句话的谓语动词是is，to do 。。。叫动词不定式在此句中作定语，说明happy的原因

一句话里只会有一个做谓语的动词，这里is就是这个做谓语的动词，后面的do在句中是与to构成不定式出现的（动词不定式是非谓语），好好看看语法书吧~

在这里，do不是助动词，而是动词。“to+动词原形”为不定式，在这里不定式是做状语。

是对的
be adj to do sth

对啊，be+形容词+to do sth.是一个句型。

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