behind是词组吗 from

from behind不是词组

例句如下，请仔细体会

1、

The Australian in lane four is coming up fast from behind.

第四道的澳大利亚运动员正从后面快速追赶上来。

2、

He was grabbed from behind and propelled through the door.

有人从后面抓住他，把他推过门去。