He has suffered from stammer

• 口吃；结巴地说出

He has suffered from stammer的用法和样例：

例句

1. He always stammered when he met her.
   他一遇见她就口吃。
2. You must never tease a child because he stutters.
   你切不可因为一个孩子口吃而去取笑他。