三种改法!
(1)His mother was too angry to say a word.
(2)His mother was so angry that she couldn't say a word.
(3)His mother was angry enough to say a word.
第一种句型：too...to...太……以至于不能……
第二种句型：so...that+从句
第三种句型：形容词或者副词+enough+to do sth.