except表示“从所提到的人或事物中除去,即从整体中除去一部分”,表示递减的概念,含义是否定的.
We all went except him.
除他之外,我们都去了.(他没有去)
except for主要有三层含义:
①表示对整体主要部分的肯定和对局部的否定起部分修正主要意思的作用.
eg.Your composition is quite excellent except for several spelling mistakes.
②表示非同类事物进行比较.
eg.The street is empty except for several cars.
③置于句首,表达except的含义.
eg.Except for thiseverything is in order.
except for后接名(代)词可以转移为except+从句或其他介词短语.
eg.The climate here is good except for some rainy days.(except when it rains;except that it sometimes rains;except on the rainy days)
注意:二者用于否定句时含义相同,意思是一样的.
eg. He did nothing besides (=except) this.
除这件事外,他什么事也没做.
从形式上看,except后面不仅可以接短语,还可以接that引导的从句,而except for后面只能接名词短语.