combing

She was combing her hair in front of the mirror when the doorbell rang.

用法提示：combing是现在分词，与was构成过去进行时，表示用梳子梳理头发这个动作。

Combing wet hair can damage it, so it's better to dry it first.

用法提示：Combing是动名词，在句中作主语，表示梳理头发这一行为。

Combing the entire house for her keys, Mary finally found them under the sofa.

用法提示：Combing是现在分词，作状语，表示在彻底搜索房子的过程中；此处表达‘仔细搜索’的含义。