could 和 would 的区别?如何用在句子里.不要从别的地方抄一到段的

could带有要求的语气~~would带有请求的语气

could) 1）表示能力，could主要指过去时间。 Could the girl read before she went to school? 这女孩上学前能识字吗？ 2）表示可能 The temperature can fall to –60℃, that is 60℃ below freezing. 气温可降至—60℃，也就是零下60℃。 He can??t (couldn??t) have enough money for a new car. 他不可能有足够的钱买新车。 3）表示允许。 He asked whether he could take the book out of the reading—room. 他问他可不可以把书带出阅览室。 4）表惊异、怀疑、不相信等态度。主要用于否定句、疑问句或感叹句中。 Where can (could) they have gone to? 他们会去哪儿了呢？ He can??t (couldn??t) be over sixty. 他不可能超过六十岁。 How can you be so careless? 你怎么这么粗心？ 5）比较委婉客气地提出问题或陈述看法。 Can (Could) you lend me a hand? 帮我一把好吗？ I??m afraid we couldn??t give you an answer today. 恐怕我们今天不能给你答复。 would 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。 I said I would do anything for you. 我说过我愿意为你做任何事。 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？ Would you mind cleaning the window? 请把窗户擦一下好吗？ They wouldn??t have anything against it. 他们不会有什么反对意见。 3）表过去反复发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。 请认真看 虽然非本人自己总结但个人认为讲的很全面 很透彻 。 有语感了区分这两个单词会很容易 。 希望对你有帮助~

could 是能 表能力 would是将 表意愿