Question

两个动词之间用to连接,后一个动词是否一定要用动词原型

Answer 1

不一定。
要看to在这里做什么。
当to 为to do 不定式时就用原型。
当to为介词是要用doing.
希望帮到你，祝学习进步！

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那They claimed________(win)in the war a week ago.怎么填？

追答

to win 呀！这里是claim to do sth.

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可老师说是to have won

追答

对对。。
已经完成啦。用完成时。
意思是：一个周前他宣布赢得了比赛。
看这个例子；

3 主张；断言；宣称：
They claimed to have discovered a new planet.

他们宣称发现了一颗新的行星。

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为什么不用to had won

追答

看这个例子：They claimed to have discovered a new planet.
就是说，比赛已经赢得了，用完成时。
Do you understand?

Answer 2

不一定，例子很多：
1. admit to doing sth 承认做了某事 2. apply to doing sth 适用于做某事3. object to doing sth 反对做某事4. see to doing sth 负责做某事 5. stick to doing sth 坚持做某事6. take to doing sth 喜欢上做某事

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那They claimed________(win)in the war a week ago.怎么填？

追答

to win
claim to do，没有claim doing

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可老师说是to have won

Answer 3

动词不定式（也就是两个动词用to连接，to是连接词）是这样，但是如果to做介词，那后面应该加动名词，就是动词加ing转换成动名词

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那They claimed________(win)in the war a week ago.怎么填？

Answer 4

后一个动词不一定用动词原型，可以是进行时 +ing

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那They claimed________(win)in the war a week ago.怎么填？

追答

won 用win的过去分词

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可老师说是to have won