我们知道too...to结构一般表示否定含义,意为"太...以致于不能" eg:He is too old to work. 但too...to在下列情况下却表示肯定含义: ⑴当too前或to前有否定词构成双重否定时. eg:English is not too difficult to learn. 英语并不太难学. He is too wise not to see that. 他很聪明,不会不懂这一点. ⑵当too后是glad,pleased,happy,delighted,satisfied,ready,willing,kind,apt,good,true,easy,near,careful,well,early,delicious,eager,anxious等形容词或副词时. eg:They are too anxious to leave. 他们急于离开. He is too ready to help others. 他总是乐于助人. 与这些词连用时,too前还常加上only,all,but,just,simply等副词,意思不变,因为这些词加上too后与very同义. eg:I’m only too glad to see you . 见到你非常高兴. They are but too pleased to hear the news. 他们听到这个消息,非常高兴. ⑶与cannot连用时. eg:You cannot be too careful(=You can never be careful enough) to do your homework. 你做作业越仔细越好(=无论怎样仔细也不过分). ⑷当不定式在句中作定语或真正的主语时. eg:There are too many problems to be solved. 有很多问题有待解决. It is too much to say that he is a fool.