call at call on 和 call sb.at

问题描述:

call at call on 和 call sb.at
call at 后加地点 call on 后加人 但是call sb. at是怎么回事呢?
求详细解答!

call sb.at和前两者不同,表示“在xx时候/地点给xx打电话”,如Jim will call me at 19:00 this evening.又如:Tom call me at school.