情态动词题(除了掌握常见情态动词基本用法外,常考点在三种表推测的情况,分别为must表对现在事情的肯定推测 ,can't表对现在事实的否定推测, must have +v-ed表示对过去事实的肯定推测,而则表示过去应该做某事而没有做)$ \8 M# N/ b& [3 p. J- ?
1、The ground is so wet, it must have rained last night. % d7 \6 _+ W6 p$ |9 h( H 2、She must be a doctor, I think. 6 f: \+ F: z- d y, G* L' [) U- q 3、I should have called you last week, but I was too busy then.