同义句Peter was very angry.He couldnt say a word

Peter was very angry.He couldnt say a word
=Peter was too angry to say a word.
=Peter was so angry that he couldn't say a word

Peter was too angry to say a word.或Peter was so angry that he couldn’t say a word.

Peter was too angry to say a word.

Peter was so angry that he couldn't say a word （so that 以至于）
或者
Peter was too angry to say a word.（too...to...结构：太...以至于不...）