情態(tài)動詞表推測用法小結

1、情態(tài)動詞表推測用法小結情態(tài)動詞 must, can/could/may/might可以用來表示對事情進行推測。（一）情態(tài)動詞對現(xiàn)在事情進行推測 情態(tài)動詞+動詞原形（do）l.must用于肯定句中，表很有把握的肯定推測，譯為。一定。Eg: Its already 12:30.Ymiust be hungry now.（你一定餓了 .）The light is still on. He must be working in the officenow.（他一定在辦公室工作）2.can用于否定句或疑問句中，很有把握的否定推測，譯為“不 可能” / 可能.”Eg: Jack can ' t b

2、e a policeman, for he' s much tooshort.（不可能是個警察）Mr Bush is on time for everything. How can it be that he was late for the opening ceremony?3 may /might用于肯定句中，語氣不很肯定，譯為“?？赡??！盓g: He may be in the classroom. I ' II go and make sure.-Are you come to the party? - I ' m not sure.itiight go to

3、the concert instead.（二）情態(tài)動詞對過去事情的推測.-情態(tài)動詞+ have done。1 must have done一定做過。2 can ' t/couldn ' t havedo一定沒做過。3 might /could have done 可能做過。Eg: I didn ' t hear the phomust have beenasleep.（我一定是睡著了 .）Jack can ' t have arriveyet; otherwise he would have telephoneme.（ Jack不可能已經(jīng)到了）Sorry I &

4、#39; m latem ight have turned off the alarm clock and gone to sleep again.（可能把鬧鐘關閉后又睡著了）注意：must have done結構中反意疑問句的用法 .句中有表過去時間的詞，反意問句部分用過去時；句中無表過去時間的詞，反意問句部分用完成時。1 The children must have watered the tomatoes yesterday, didn ' t they?2 They must have been very tired last week, weren' they ?3

5、The minister must have arrived in Shanghai , hasn' he?（三）情態(tài)動詞表責備語氣1 should /ought to have done-本應該而沒做了（表強烈的責備或遺憾的語氣）We should have studied last night, but we went to the concert instead.1 was really anxious about you. You shouldnholnheive leftwithout a word.2 could /might have done-本可以做 而沒做（責備或遺憾的語氣比 should /ought to have done弱）He might have given you more help, even though he was very busy.3 needn