look for + 名词意为：找……
I am looking for my bag.我正在找我的包.
look like 看上去像
She looks like her mother. 她长得像她妈妈.
look up 向上看,抬起头看
She said no without looking up from her book.她看着书,头也不抬得说不.
look up to像谁谁看齐,或达到什么要求
He works hard to look up to his parents' requirement. 未达到父母要求,他非常努力.