1)too…to 太…以至於…
He is too excited to speak.
他太激動了，說不出話來。
---- Can I help you ? 需要我幫忙嗎?
---- Well, I'm afraid the box is too heavy for you to carry it, but thank you all the same. 不用了。這箱子太重，恐怕你搬不動。謝謝您。
2) 如在too前有否定詞，則整個句子用否定詞表達肯定， too 後那個詞表達一種委婉含義，意 為"不太"。
It's never too late to mend. (諺語)
改過不嫌晚。
3) 當too 前面有only, all, but時，意思是：非常… 等於very。
I'm only too pleased to be able to help you. 我非常高興能幫助你。
He was but too eager to get home. 他非常想回家。
