As Mr. Liang walked in the classroom, he looked around to make sure no students were using cell phones. I like to listen to music as I do homework.
Conclusion : as引导的从句动作与主句动作同时发生,表示“一边……一边……”;
Yiyi喜欢一边走路一边唱歌。 父亲边和我跳舞边和我聊天。
Yiyi likes singing songs as she walks.
Dad chatted with me as he danced with me.
As time goes by, I have come to realize how deep my dad loves me. As he grew older, he began to go deaf.
”随着“ 强调两个动作同时变化。