九年级英语学习了表示推测的情态动词must,could,may,might,can等。它们在表示推测的时候,用来说明说话者的主观看法。首先来看下面的例句。【例句】1.You’ve had no sleep for 36hours.You must be very exhausted.你已经36小时没睡觉了,你一定筋疲力尽了。2.Don’t play with the knife.You could/may/might cut yourself.不要玩小刀,你会伤了自己。3.He can’t be at home.He has gone to Shanghai.他不可能在家。他去上海了。 Grade 9 English learned to speculate modal verbs must, could, may, might, can and so on. They are used to illustrate the speaker’s subjective opinion when it comes to speculation. First look at the following example. 【例句】 1.You’ve had no sleep for 36hours.You must be very exhausted. You have not slept for 36 hours. You must be exhausted. Do not play a knife, you will hurt yourself. He can not be at home. He has gone to Shanghai. He can not be at home. He went to Shanghai.