94 情態(tài)動詞表示推測 Track 094
(1)對現(xiàn)在的肯定推測
我們以Why isn’t John in class?(約翰為什么沒上課?)為例,來看must,may,could,might,can在表示對現(xiàn)在情況的肯定推測時的用法區(qū)別。
例句
a. You’ve been traveling all day. You must be tired.
b. Carol must get very bored in her job. She does the same thing every day.
c. I have one teacher who is so forgetful that he gave the same test three weeks in a row. If he does that two more times, I may pass it.
d. Michael: Teacher, is there life after death?
Teacher: Why do you ask?
Michael: I may need the extra time to finish all this homework you gave us.
(2)對現(xiàn)在的否定推測
我們以The restaurant is always empty.(這家餐館人總是很少。)為例,來看“情態(tài)動詞表示對現(xiàn)在情況的否定推測”的用法。
注意:must表示推測時,一般不用在否定句中。在肯定句中,could,may,might三者差別不大。但在否定句中,couldn’t比may not和might not語氣強烈得多。
例句
Judge: How could you swindle people who trusted in you?
Prisoner: But Judge, people who don’t trust you cannot be swindled.
法官:你怎么能夠詐騙信任你的人呢?
罪犯:但是法官大人,不信任你的人是不可能被你騙的。
(3)對過去的肯定推測:must/can/may/could/might + 完成式
下面我們以Why wasn’t John in class yesterday?(約翰昨天怎么沒上課?) 為例,來看“情態(tài)動詞表示對過去情況的肯定推測” 的用法。
(4)對過去的否定推測
下面我們?nèi)砸訵hy wasn’t John in class yesterday?(約翰昨天怎么沒上課?) 為例,來看“情態(tài)動詞表示對過去情況的否定推測” 的用法。
(5)對將來的推測
下面我們以Tomorrow John will take a test. (約翰明天要考試。)為例,來看“情態(tài)動詞表示對將來情況的推測” 的用法。