不定式和动名词的根本区别

不定式和动名词有许多共同之处,从结构上讲,他们都是动词的非限定形式;从功能上讲,他们都能在句子里当主语、宾语和补语等。他们往往可以“同义互换”:(1)a To send him a letter would have been a mistake.(1)b Sending him a letter would have been a mistake.但是,他们又不尽相同:(2)a To send him a letter has been a mistake。(2)b Sending him a letter has been a mistake.不定式和动名词的区别在他们当宾语时显得特别突出:有的动词只能带不定式作宾语,有的动词则只能带动名词作宾语;有的动词二者都行,且意思相去不远;有的动词虽然也二者都行,但意思大相径庭。