题目内容：

Tom is the first boy to take a shower every morning.的句子成分
为什么不能说Tom is the first boy takes a shower every morning.

优质解答

Tom is the first boy takes a shower every morning.
这句话里有两个动词了看到没有?is 和takes
不过你在里面加一个who就可以了
Tom is the first boy who takes a shower every morning.