1. 第一人称+主观判断的v.，后面的宾从中的否定要转移到主句
2. The other day, my brother drove down the street at ____ I thought was a dangerous speed.
4. A saying goes ____ no pain, no gain.
6. 表示原因的表语:The reason is that = It/ This/ That is because =This/ That is why
8. 定义:名词性从句是在主句中充当名词性成分的句子。
11. 并列宾从中第一个that 可以省略，第二个conj.不能省。
14. whether / that (主语从句中没有if)
15. 从句的类别:上述四个名词性成分如用句子来充当，便成了名词性从句，它们分别为:主语从句、宾语从句、表语从句、补语从句。
20. Mary wrote an article on _____ the team had failed to win the game.
25. 信号词:主句中有抽象名词news, information, idea, thought, fact, truth, hope, belief，suggestion, advice, assumption, plan, practice, proposal 等，从句用来说明名词所表示的具体内容。
26. It seems / appears/ looks + that (as if / 连词省略)
27. He left a word with my secretary _____ he would call again in the afternoon.
29. 宾从中的连接词that可以省略，但其它的连词不能省。
30. 语序:宾从一定是陈述语序:I don’t know when he will come.
32. 时态:主句是过去时，从句要用和过去相关的时态，除非是普遍真理。
