1to come down
2(completed action marker)
3(indicates continuation from the past towards us)
4to be harvested (of crops)
5to be over (of a period of time)
6to go among the masses (said of leaders)
7(after verb of motion, indicates motion down and towards us, also fig.)
Examples
nǐ你zhī dào知道wèi shén me为什么tā men他们ān jìng安静xià lai下来le了ne呢？
你知道为什么他们安静下来了呢？
Do you know why they stopped talking?
有些苹果从树上掉了下来。
Some apples fell down from the tree.
请把他所说的记录下来。
Please write down what he says.