welcom 做动词时只有welcom to sth. welcom to my home.
welcom做形容词时就可以be welcom to do sth. You are welcom to come to my party.
2. I met a girl (who looks) like you very much on a bus.
3. I think of a woman star when i see you.
4可以的.i have the same car as you (do)