as 一边...一边…(主从句的谓语动词必须是同时发生的） 她边唱歌边做作业。 She sang as she worked. 我刚要出门，电话就响起来了。 The phone rang just as I was leaving the house. 她沿着路走着，心里想着她父亲。 As she walked along the road, she thought about her father.