fool

n. 愚人,受骗者
v. 愚弄,欺骗

That silly child never does anything; he just fools about all day long.

那个傻孩子从来不做事，只是整天游手好闲。

What a fool I was to believe he is a good man.

我竟然相信他是个好人，我真是个傻瓜。