she is smart enough to go into business.这句话中有行为动词,为什么还可以用IS呢

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she is smart enough to go into business.这句话中有行为动词,为什么还可以用IS呢

she is smart enough to go into business.这句话中有行为动词,为什么还可以用IS呢
she is smart enough to go into business.
这句话中有行为动词,为什么还可以用IS呢

she is smart enough to go into business.这句话中有行为动词,为什么还可以用IS呢
行为动词是go,和is没关系.这个句子的句型是:
be +adj(形容词)+to do(动词不定式结构)
我认为,前部分she is smart是个主系表结构.she是主语,is是谓语动词,smart是个形容词,做表语.
enough是副词,来修饰形容词smart的,姑且不管它.
后面的to go into business是个动词不定式,做表语补足语,来补充说明前面的部分.
她足够聪明,足够聪明的可以干什么呢?后面的to go...便补充说明,原来她足够聪明去经商啊!

这个句子的谓语是is,to go into business这里的go into不是句子的谓语,只是起到一个补充说明smart的作用。

samart enought to do
所以主句的动词是is