英语中,“落下”怎么说?

Fall down ；go down, drop; falling; go behind 都是 ,根据不同语境
例句：
一年中的这个时候,太阳在早上五点钟升起,到晚上八点半光景才落下.
At this time of year the sun comes up at five in the morning and goes down at about eight-thirty in the evening.
一个花盆从他家阳台落下.
A flower pot dropped from his balcony.
十月里树叶开始落下.
Leaves begin to fall in October.
我的家庭作业落下了.
I've got behind with my homework.

fall down

fall behind 落后
leave behind落下，忘记携带

fall down

drop/fall down/fall off