Unit-2-Healthy-eating-Grammar-情态动词II（学生版）(共3页).doc

B3U2 Grammar 情态动词II (Modal Verbs) 一情态动词ought to的用法 Eg: 1.Ask John. He ought to know.问问约翰吧，他该知道。 2. To keep fit，we ought to learn more about our body. 3. He ought not to do it. / He oughtnt to do it.他不应该做这件事。 4. Ought we to do it at once? 我们应该马上做这件事吗？用法归纳1.表示推测（可能性几近现实）如例句_ ; Dont worry. We _. 我们应该会赢。2.表示义务或责任,如例句_，意为应当；应该(没有人称和数的变化，后接动词原形)He thought that they_ the design. 他认为他们应