as fast as his/her legs could carry him/herFAST/QUICKas fast as possible 拼命地跑,飞奔 She ran as fast as her legs could carry her. 她拼命地跑。
as fast as his/her legs could carry him/her• She ran to her mother as fast as her legs could carry her.
→ as fast as his/her legs could carry him/her at carry1(11)