at time,to time,on time,in time的区别去解释答:at time偶尔,E.G 1.One expects healthy children to be mischievous at times.健康的孩子有时很调皮,这是意料之中的.to time 没听说过,from time to time,有时,不时,adv on time 准时,E.G You should attend the meeting on time.你应该准时参加会议 in time及时 E.G finish it in time ...