4、总结:情态动词有人称和数的变化吗?也就是说动词需要进行变化吗?He/She/I/You/Theycan______________(sing).作业堂堂清:(一)单项选择( )1.CanJohnplaythe____well?A.pianoB.basketballC.chessD.football( )2.Mysistercan't___________inariver.A.skateB.runC.swimD.jump( )3.Can’t you see it on the blackboard? A.Yes,I can’t B.Yes,I