做状语的句子就是状语从句，大致有11类：
① I was reading when he came in. 当他进来的时候，我正在读书。（时间状语从句）
② He put the book where it had been. 他把书放在原来的地方。（地点状语从句）
③ I have to say goodbye to you because someone is waiting for me at my home. 我不得不向你告别，因为有人正在家里等我。（原因状语从句）
④ He plays piano as well as she does. 他弹钢琴和她谈的一样好。（比较状语从句）
⑤ Though it is late, we should finish the work first. 尽管天晚了，我们还是要先完成工作。（让步状语从句）
⑥ He did it as I told him. 他按照我告诉他的方式做了这件事。（方式状语从句）
⑦ He worked hard for many years so that he succeeded at last. 他努力了很多年，结果终于成功了。（结果状语从句）
⑧ He got up early in order that he might arrive on time. 为了按时到，他起得很早。（目的状语从句）
⑨ I will lend you the book if you can return it on time. 如果你能按时还，我就借给你这本书。（条件状语从句）
⑩ He is reading while his sister is watching TV. 他在看书，而他的姐姐在看电视。（对照状语从句）
⑪ We should help him rather than he should help us. 我们应该帮助他，而不是他帮助我们。（选择状语从句）
