Expect後面加什麼介詞

後面加介詞for，例如：

1、I had nothing on except for my socks.我除了短襪什麼都沒穿。

2、The walls were bare except for a clock.牆上除了一隻掛鐘什麼也沒有。

3、There was no light except for the occasional glow of a cigarette.除偶爾有香煙的微弱紅光外沒有一點亮光。