初中英语常见情态动词的用法 一、can could 的用法 ① 表示能力,意思是“能,能够,会”。 can 表示现在的能力时,既可表示做某桩具体事情的“能力” ,也可泛指一般的 能力(《新编英语语法教程》,可用于肯定句,否定句,疑问句等句中。例如: * He can speak English. (一般的能力) * I can climb this cliff(峭壁) .(具体的事情) * Is there anything I can do for you? (具体的事情) * She can’t play the piano. (一般的能力) * He can drive a car. (一般的能力) * He is only four,but he can read. (一般的能力) (注) ○ can 表示现在的“能力” 时,也可以用be able to ,即把 be able to 用为一 般现在时,二者可通用,但 can 用得较多。如: * I can/ am able to swim. * As I have enough money,I can /am able to help her. ○ 表示将来的能力常用will /shall be able to 表示。例如: *Iwill be able to speak German in another two months . * If he doesn’t apply soon,he won’t be able to get the job. 但若表示现在决定将来是否有能力做某事,则可用 can。例如: * Can you come to the party tomorrow? 你明天能来参加我们的聚会吗? * We can discuss that later. * I’m too busy today, but I can come to your place tomorrow. * He will be free tomorrow afternoon, so he can go to the lecture. * Can you come to a party on Saturday night? ○ 表示过去的能力可用was/were able to,也可用could ,在肯定句中,could 仅是用于表示泛指过去的一般能力,如果要指过去做某桩具体事情的能力 通常不用could 要用was/were able to(以及 managed to),当然在否定 句中,can 和 be able to 无此限制:could 既可表示过去的一般能力,也 可表示过去做某桩具体事情的能力。例如: *I could walk when I was eight months old. * I was able to walk 50 meters in a minute when I was eight months old. * He was able to swim halfway before he collapsed(动词:衰退) . * He was able to translate the article without a dictionary. * I couldn...