【正文】
No, you mustn’t. May/Might I take this book out of the room? Yes, you can. (No, you can’t / mustn’t. ) 用May I...?征徇對(duì)方許可時(shí)比較正式和客氣,而用Can I...?在口語中更常見。 May you succeed! 3) 表示推測(cè)、可能性(不用于疑問句)。 1.He may /might be very busy now. 2.Your mother may /might not know the truth. 三、 must, have to 1) 表示必須、必要。Must只有一般現(xiàn)在時(shí), have to 有更多的時(shí)態(tài)形式。 1. How dare you say I’m unfair? 2. He daren’t speak English before such a crowd, dare he? 3. If we dared not go there that day, we couldn’t get the beautiful flowers. 2) need 作情態(tài)動(dòng)詞用時(shí), 常用于疑問句、否定句。 1.You needn’t e so early. 2. Need I finish the work today? Yes, you must. / No, you needn’t. 3) dare和 need作實(shí)義動(dòng)詞用時(shí), 有人稱、時(shí)態(tài)和數(shù)的變化。在疑問句和否定句中,dare后面可接帶to或不帶to的不定式。 1. I dare to swim