Question

TOO......TO 的用法，急啊

Answer 1

too...to 结构表示肯定含义的情况：
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.
他年纪太大以致于不能工作。

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。

Answer 2

too + adj. +to + do
太。。。。以至于不能。。。
句中不和not连用
He was too tired to finish his work before 5 p.m.
他太累了以至于不能在下午5点前完成工作。

Answer 3

太……以至于不能……
too adj/adv for sb to do sth

同义：so adj adv that …can't

Answer 4

补充一些：
only too...to do sth.=very...to do sth. 做某事很
far too...to=too...to 太……以至于不

Answer 5

too adj. to do sth
太adj.了，以至不能do sth