(共20张PPT) Grammar Unit 2 Let's celebrate might ought to can't should might needn't shouldn't will may ought to needn't have spent must have taken ought to pay attention to shouldn't be any difficulty should be so rude The end Thank you ● ● ● ● ● ● ● ● ● 0 ● ● ● ● ● ● ● ● ● ● ● ● ●