1）表意愿。
they would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。
2）表委婉地提出请求、建议或看法。
would you like another glass of beer? 再来杯啤酒好吗？
3）表过去反**生的动作或过去的一种倾向。
every time she was in trouble, she would go to him for help.
她每遇到麻烦都会向她求助。他告诉我盒子打不开了。
8. ought to
1）表义务，意为“应该”（因责任、义务等该做），口气比should稍重。
you are his father. you ought to take care of him. 你是他父亲，应当管他。
you oughtn’t to smoke so much. 你不应该抽这么多烟。
2）表推测，暗含很大的可能，语气较弱。
there’s a fine sunset; it ought to be a fine day tomorrow. 今天有晚霞，明天应该是个好天。
9. used to
表示过去的习惯动作或状态，现在不**生或存在。疑问式和否定式有两种。
he used to live in the countryside, but now he lives in the city.他过去住在乡下，现在住在城里。
there used to be a building at the street corner, but it has been pulled down.
街道拐角处过去有座楼房，现在拆了。
i usedn’t (didn’t use) to smoke. 我过去不抽烟。
used you (did you use) to go to school on foot? 你过去常步行去学校吗？
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