1. drop off : 离开, 散去, 逐渐减少；
2. drop through : 失败；
3. drop away : 离开, 散去；
4. drop behind : 落后；
5. drop across : 偶遇, 惩罚；
6. drop out : 退出, 掉出, 退学；
7. drop back : 退后；
8. drop by : 随便访问；
及物动词
不及物动词
道别
投标
Two - word Verbs-(成语动词)
1. （使）降低;（使）下降;（使）减少
If a level or amount drops or if someone or something drops it, it quickly becomes less.
2. (意外地)使掉下,使落下
If you drop something, you accidentally let it fall.
3. 掉到…上;从…上掉落
If something drops onto something else, it falls onto that thing. If something drops from somewhere, it falls from that place.
4. 投下;丢下;扔下;掉下
If you drop something somewhere or if it drops there, you deliberately let it fall there.