说明
all too, but too, only too
核心问题
It is all too easy to blame the railway authorities when something does go wrong. (New Concept English, Book 3, L. 37)
我已牢记 too...to do 结构是表示否定的意思。不知上句中的 too easy to blame 是否也具有否定意义。
词典解答
在一般情况下,too...to do 结构具有否定意义。例如:
He was too excited to say a word. 他激动得一句话也说不出来。
但是，当 all too, but too, only too, quite too 与动词不定式连用时，就没有否定意义了。
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They are all too satisfied to take the opinions of others without the pain of thought for themselves. 他们都满足于不费脑筋思考就采纳别人的观点。
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“Yes, I think you’d better leave off,” said Tom, and Alice was only too glad to do so. 汤姆说：“是的，我认为你最好是离开。”于是艾丽丝便很高兴地离开了。
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I'm only too pleased to help you. (Palmer) 我很高兴帮助你。
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They are but too glad to do so. 他们很高兴这样做。
(参见 only too)