1.在...的背後;在...的後面;向...的背後
There is a garden behind the house.
屋後有個花園.
2.落後於,不如
George always falls behind his schedule.
喬治老是不能按時完成計劃.
3.遲於;晚於
She arrived at the office ten minutes behind her usual time.
她到辦公室時比往常晚了十分鐘.
4.支持
The senators are fully behind his
at the back of
(1) 在……的後面(範圍之外)”.如：
There is a little garden at the back of the house.房屋後有個小花園.
We planted some trees at the back of the school.我們在學校後面種了些樹.
註：用於此義時,相當於 behind.
(2) 在……的後部(範圍之內)”.如：
There is a little room at the back of the house.房屋後部有個小房間.
The index is at the back of the book.索引在書末尾.
註：用於此義時,不能用 behind 換.
(3) 用於引申義.如：
Someone must be at the back of this.這事壹定有人在背後搗鬼.