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4. not与除谓语以外的其他句子成分连用：
Come early, but not before six.
It’s working, but not properly.
I believe he will succeed, though not without some difficulty.
not用在I hope; I believe; I’m afraid; I guess; I suppose; I expect之后，构成省略句。
—Will it snow today ?
—I hope not.
5. 用no构成否定句：no 名词（单，复数，不可数）相当于not a 名词/ not any 名词
No machine would work for long if it were not properly lubricated.
The nations of Europe and America have found that no country can produce all its needs without trading.
Take that towel, I have no other.
I can walk no farther.
There is no knowing what will happen.
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