What are you looking for?I can't remember where i left my keys.为什么不是has left瞬间动词只是不能和一段时间的壮语连用，瞬间动词用于完成时是可以的。但是很难区分是强调动作的过去还是影响。

What are you looking for? The Feeling What You Are Looking For 是what are you looking at?还是 what are you looking 你在看什么 what are you looking?还是what are you looking at? what are you looking 后面为啥一定要接at呢?单what are you looking IS THAT what YOU ARE LOOKING FOR为什么用what Is that house _____?A.that you are looking for B.what you are looking for C.you are looking for D.which you are looking for looking for what?是什么意思?而不是what are you looking for what? What we are looking What are you looking＿＿＿?填介词 what are you looking for 的意思清楚一些, what you are looking forward to_____（come）true What kind of person are you looking for? what you are looking at is my homework What kind of a person are you looking for? What kind of job are you looking for? What are you doing?I'm looking ___my pencil. What are you __________now?A .looking for B.finding