look for them还是look them for

是look for them，例如：

1、But we didn't look for them.因为我们从未找寻过它们。

2、I can not find my family members. I don't even know how to look for them.我找不到家人了，我也不知道去哪里找。

3、So very seldom do we really pay attention to the fact that life does have rules if you look for them.我们很少真正去注意这个事实那就是如果你仔细去找生活中是存在规则的。