put down的用法及短语

put down有几层用法：
1.放下：Danny put don his glass.丹尼放下他的玻璃杯；
2.写下：Never put everything down on paper. 不要在纸上写任何东西。
3.镇压：Soldiers went in to put down a rebellion. 士兵们攻进去镇压了叛乱。