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) ' h9 o1 p+ r# ` 1、The ground is so wet， it must have rained last night.9 M, V" [% Q: \3 A# ~# } s7 I; j
2、She must be a doctor， I think.6 t5 M; P. D9 v' U4 |; Y( f6 T
3、I should have called you last week， but I was too busy then.
发表于 2012-6-25 15:37:02
