情態(tài)動(dòng)詞只有情態(tài)意義-閱讀頁
2024-08-23 00:43本頁面
【正文】 middle school. 后只接表動(dòng)作的動(dòng)詞，不接表認(rèn)識(shí)或狀態(tài)動(dòng)詞 He used to be nervous in the exam. ?。骸 hen we were very young, we used to / would go skating every winter. 2. 表示過去的次數(shù)時(shí)，不能使用： ( √）We went to the Great Wall five times when we were young. ( X ) We used to go / would go to the Great Wall five times when we were young. 注：used to do的否定式：usedn’t to do 或didn’t use to do (usedn’t也可寫作usen’t) 疑問式： Did you use to do ? Didn’t you use to do? Used you to do? Usedn’t you to do? 情態(tài)動(dòng)詞表推測(cè) 情態(tài)動(dòng)詞表推測(cè)的意義： 大多數(shù)情態(tài)動(dòng)詞（除表‘能力、許可、意志’外），都可以表示推測(cè)，其程度有差異。 句中如有表示不肯定的話語，如：I am not sure。 He could have finished the task on time, but the heavy snow came. 2). couldn’t +have + PP表示本來不能做到，但已經(jīng)做到了。 She needn’t have attended the meeting yesterday, but she did. 4.) should/ought to +have + PP表示 該做而沒有做 The plant is dead. I should/ought to have given ot more water. 5) shouldn’t/ oughtn’t to +have + PP表示 不該做而做了。以 must 為例： eg. 1. You must be hungry now, aren’t you? 2. He must be watching TV , isn’t he ? 3 Tom must have lived her for a long time, hasn’t he ? 4. She must have arrived yesterday, didn’t she? 注：如選擇題中（以She must have arrived yesterday, didn’t she？為例）既有didn’t she又有hasn’t she則以didn’t she？為最佳答案7
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