误：He had so obstinate characters that no one liked him.
正：He had so obstinate a character that no one liked him.
意：他的性格非常固执，没有人喜欢他。
根据英语语法，当 as, how, so, too 修饰“形容词+名词”时，其中的“名词”应是单数可数名词（即名词前应有不定冠词），不能是复数名词。即：
误：as / how / so / too+形容词+名词（复数）
正：as / how / so / too+形容词+a / an+名词（单数）
类似例句如：
She is as good a cook as her mother. 她像她母亲一样会做饭。
It was so hot a day that I could hardly work. 天热得我简直没法工作。
How good a pianist is he? 他钢琴弹得怎么样?
The song was in too high a key for the singer. 这支歌的调子对这位歌手来说是太高了。
用作程度副词的 this, that 也有类似用法。如：
I’ve never seen this thick a book. 我从没见过这么厚的书。
I can’t believe he was that good an actor. 我简直不敢相信他是那么好的一位演员。
