He ought to be studying for his exam．He shouldn't be spending all his time on the beach．
他本该正在学习以备考试。他不该把他的全部时间都在海滩上度过。We should be wearing seat belts．
我们应该系好安全带。（但我们没有系安全带。）
I shouldn't be telling you this．It's supposed to be a secret．
我不应该告诉你这件事。这是个秘密。
You can memorize words in an efficient way if you pronounce them reasonably. Say words correctly, and you will learn them easily. Correct pronunciation means correct spelling of the words. English spelling is not good to guide its pronunciation. But spelling and pronunciation have closed relationship. They match each other perfectly. Sometimes we can pronounce a word according to its spelling. English pronunciation can also guide its spelling. This is a two-way communication.
