備戰2019屆高考英語(通用版)一輪復習專題12 情態動詞
need you go yet?
yes,i must./no,i needn’t.
3)need 的被動含義:need,want,require,worth(形容詞)后面接doing,也
可以表示被動:
need doing=need to be done
【考點詮釋】
情態動詞考點透析
考點一、情態動詞基本含義的考查
情態動詞的基本含義,一直是高考考查的重要內容。例如:
1. the fire spread through the hotel very quickly but everyone______get out. a. had to b. would c. was able to d. could
2. when can i come for the photos? i need them tomorrow afternoon.
—they______be ready by 12:00.
a. can b. should c. might d. need
【解析】can:能夠;should:應該,表示責任、義務。might:可能;need:需要。它們應該在12點前準備好。所以,答案是b。
3. you can’t imagine that a well-behaved gentleman______be so rude to a lady .
a. might b. need c. shouldd. would
二、情態動詞表示推測的考查
對情態動詞表示推測的用法,是高考考查情態動詞的一個重要方面。例如:
1. sorry, i’m late. i______have turned off the alarm clock and gone back to sleep again .
a. might b. should c. can d. will
【解析】might have done : (過去)可能做過某事;shouldhave done :本應該做某事。根據本句提供的情境i’m late 表明說話人可能把鬧鐘關上了。答案是:a。
2. my sister met him at the grand theatre yesterday afternoon,so he______your lecture.
a. couldn’t have attended b. needn’t have attended
c. mustn’t have attended d. shouldn’t have attended
【解析】couldn’t have done: (過去)不可能做某事; needn’t have done:本來不必做某事;mustn’t have done:一定未做過某事: shouldn’t have done:本不該做某事。根據提供的情境my sister met him at the great theatre表明他不可能參加講座。答案是:a。
3.mr bush is on time for everything. how______it be that he was late for the opening ceremony?
a. can b. should c. may d. must
【解析】can表示可能性。布什先生按時做一切事,他怎么可能開幕式遲到呢?答案是:a。
4.i heard they went skiing in the mountains last winter?
—it______true because there was little snow there.
a. may not be b. won’t be
c. couldn’t be d. mustn’t be
【解析】may not be : 可能不是;won’t be:不會是;couldn’t be:不可能是; mustn’t be :一定不是。根據提供情境there was little snow 說明山里滑雪是件不可能的事,may not 語氣不如couldn’t強。答案是:c。
分析:高考對表示推測的情態動詞集中在must, can, could, may, might上,準確掌握它們使用的場合,是解決問題的關鍵。must 用于肯定陳述句,表示肯定推測;can, could用于疑問或否定陳述句,表示可能性推測;may, might用于陳述句,表示可能性推測;用于否定陳述句中,can’t (不可能)的語氣比may not(可能不)強。此外,還要注意有對過去和對現在兩種情況的推測,對過去推測用情態動詞+have done ,對現在推測用情態動詞+ 動詞原形。