behind作“留于身后”“走后留下”解时常与leave,stay,remain等动词连用；作“当某人已通过…之后”解时常与bolt,cling,close,shut,slam等动词连用。
例句：
She has ten years' useful experience behind her.
她有十年的经验，能派上用场。
He's behind the rest of the class in reading.
他的'阅读能力不及班上其他人。
Your feet must be behind the line when you serve.
发球时你的脚必须站在底线的外面。
'There you are,' said a voice behind me.
“你来啦。”我身后一个声音说道。
He wasn't well, so we had to leave him behind.
他身体不适，因此我们只好把他留下。