Section Ⅲ Grammar--复习情态动词
语 境 自 主 领 悟 先观察原句 ①They could go anywhere they wished.
②We could see the sun setting behind the white pagoda.
③We shouldn't waste a drop of water.
④It may be true.
⑤He might have some fever.
⑥Since it is raining,we have to stay indoors.
⑦We must learn English well.
⑧Must you listen to the loud music at night? 后自主感悟 1.①②句中情态动词表示"有能力做某事"。
2.③句中,情态动词表示"不应该(做某事)"。
3.④⑤句中情态动词表示"推测"。
4.⑥⑦句中,黑体部分均表示"必须",但must多表示主观意志,而have to多强调客观上的需要。
5.⑧句中must意为"偏要,硬要",常常表示质问或不耐烦。
1.can和could (could是can的过去式,语气更委婉)
(1)表示能力。
He can use the computer skillfully now,but he couldn't last year.他现在能熟练使用电脑了,但去年他不会。
(2)表示可能性(肯定句中表示"一时的可能性"),可译为"有可能;有时会"。
Training by oneself in a gym can be highly dangerous.一个人在体育馆训练有时会很危险。
(3)表示许可。
-Can/Could I have a look at your new pen?