【改为祈使句(1)Youmusthandinyourhomeworkontime.(2)Youmustn'tplaybaskerballinthestreet.(3)Youmustkeepquietinthereadingroom.(4)Youmustn'tbelateforschool.(5)youshouldn'tfrightenthedog.(6)youcan'tswimintheriver.(7)you】

　　改为祈使句(1)Youmusthandinyourhomeworkontime.(2)Youmustn'tplaybaskerballinthestreet.

　　(3)Youmustkeepquietinthereadingroom.(4)Youmustn'tbelateforschool.

　　(5)youshouldn'tfrightenthedog.(6)youcan'tswimintheriver.(7)youcancrosstheroadwhenthelightisgreen.(8)youshouldlistencarefullyinclass.