1、基本意思：
too+形容詞/副詞+to do 太….以致不能
+從句 如此....以至於
enough+名詞+to do. 有足夠的.做某事
形容詞/副詞+ enough+to do. 足夠.做某事
如：
（1) I was too excited to say a word我激動得一個字也説不出來。
（2) Tom is too short to reach the apple Tom太矮了，拿不到那個蘋果。
（3）there is enough room to hold these people to have a meeting有足夠的地方容下這些人開會。
（4) The boy is strong enough to carry the heavy box這個男孩ルカ氣夠大，能搬動這隻箱子
（5）The boy is so strong that he can carry the heavy box
2、句型轉換
句型，這是一個否定句型，不能在不定式前加not。可以用.結構改寫也可以用enough否定句型加反義詞表述同意思
*too…to與 so…that sb. can’t…的句型轉換：前者為簡單句，主語只有一個，而後者為複合句，主語有兩個，試比較：
（1）The man was too angry to be able to speak.
=The man was so angry that he wasn’t able to speak.
（2） I was too excited to say a word我激動得一個字也説不出來。
=I was so excited that I couldn ’t say a word
*too…to…與 not enough to句型的轉換：
（1）He is too young to get married.
=He is not old enough to get married.
（2）The book is too difficult for me to read.
=The book is not easy enough for me to read.
三個句型轉換：
如：
(1)I am too fat to sit我太胖以至於不能坐
=I am not thin enough to sit
=I am so fat that I can’t sit
(2)I am too young to go to school
=I am not old enough to go to school
=I am so young that I can’t go to school
(3)Tom is too short to reach the apple Tom太矮了，拿不到那個蘋果。
= Tom is not tall enough to reach the apple
=Tom is so short that he can’t reach the apple
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