重点9 介词besides
except
except for
but 的用法之异同
besides 除了… 还有…
except 除了… 都… except for 除了…, 只是…(对整体情况的一个修正,but常与下列词连用:a.否定词no one, none, nothing等; b.疑问词who, what等; c.不定代词all, everyone等; 在but, cannot choose but,与cannot help but 之后的不定式一般都不带to, 常译为“不得不”。和一般介词不同的是besides、except 的后面可以跟when, where,that 等连词引导的宾语从句。
例句：
Nothing but disaster would come from such a plan.
Who but Tom would do such a thing?
All the students went to see the movie except Tom, because he was absent that day.
They all went to see the movie besides Jack.
Your composition is good except a few spelling mistakes.
I can’t but admire her courage.
另外，在but 之前如有实意动词do,其后的不定式不用to, 即：do nothing but +动词原形，译为“只好…”例如：
He does nothing but complain.
He had no choice but to accept the fact.
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