互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒Ex.) He was late .That's because he got up late.
.He got up late. That's why he was late.(表语从句)
(the reason) why/for which he was late. (定语从句)
当先行词为way时，定语从句常用that, in which,或how引导，that常可以省略。
way后的定语从句 的引导词不用时较多。但如果关系词在句中作主语或宾语
时，则用which或that 引导。如:
1. This is the way (that) /in which I do such things.
比较: Please do the experiment in the way (that/which)I have shown you.
Ⅳ. 限制性定语从句与非限制性定语从句的区别：
1. 形式上，非限制性定语从句往往用逗号隔开。
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