后面加介词for,例如:
1.I had nothing on except for my socks.我除了短袜什么都没穿。
2.The walls were bare except for a clock.墙上除了一只挂钟什么也没有。
3.There was no light except for the occasional glow of a cigarette.除偶尔有香烟的微弱红光外没有一点亮光。
expect后面加介词for,
组成短语expect for,是固定搭配,
意思是:除了什么之外。