"however" 是一个副词或连词，用于表示转折、让步或强调。以下是 "however" 后面通常跟的句型：

作为副词

however + 形容词/副词 + 主语 + 谓语：

例如：However cold it is, he always goes swimming.

however + 形容词/副词：

例如：However difficult the problem is, we can solve it.

作为连词

however + 形容词/副词 + 主语 + 谓语：

例如：However tired he was, he continued working.

however + 形容词/副词：

例如：However much it hurt, he could do it.

however + 副词：

例如：Phone me when you arrive, however late it is.

引导让步状语从句

however + 形容词/副词：

例如：No matter how difficult the task is, we will complete it.

however + 副词：

例如：No matter how cold it is, she always wears a smile.

插入语

however通常放在句首、句中或句末，用逗号与其他词隔开：

例如：He was very tired, however, he continued working.

总结：

"however" 作为副词时，通常后面跟形容词或副词，再跟主语和谓语，或者单独使用。

"however" 作为连词时，后面跟形容词或副词，再跟主语和谓语，或者单独使用。

"however" 引导让步状语从句时，后面跟形容词或副词。

"however" 也可以作为插入语使用，前面通常用逗号隔开。

希望这些信息对你有所帮助!