come 和come over 和 come by 有什么区别

come over 过来;突然感到;顺便来访;在上空[上方]经过

come by 经过; 从旁边走过;美来串门;得到

over一般有个从上方越过的感觉

by一般有个从旁边过去的感觉

具体用哪个还要根据语境,凭语感是最好的.

追答：

不能，这里come over是指过来，来到我这边，是有目的的。

如果用come by，只能指无意识的经过，而后面又有to的目的状语，就不符合意思了。应该是She came by and I asked her to help me.

还有那个come时态用的不对，应该用过去式came或者三单comes

追答：

走遍美国是口语，而且你看我给你的解释“come by 经过; 从旁边走过;【美】来串门;得到”中有说明“来串门”的意思。

追答：

come over：

从远处来：He has come over to China for the summer.

改变立场：After a long debate they all came over to our side.

顺便来访或有目的的来：You really must come over sometime and have dinner with us.

有某种感觉：A feeling of nausea came over her.

欺骗：He can't come over me with his story.

come by：

从旁边走过：Come by anytime.

得到：How did you come by that picture?

获得：I hope that money was honestly come by.