at hand
在手边
I haven't my book at hand.我的书不在手边.
即将到来
He believes that the great day is at hand.他相信这个伟大的日子就要到来.
in handhand in 是 “上交” 反义词是 hand out “分发”
e.g. Please hand in your homework in time.
（请及时上交作业）
hand on是“转发” 或 “传递” 这个词组的on 是副词，on表示“继续”
往往构成词组 hand on sth. to sb.
e.g.Please hand on the newspaper to Tony./
Please hand the newspaper on to Tony.谢谢～