选用can(not),must(not),should(not),have to,may
选用can(not),must(not),should(not),have to,may
can not must not should not ...虚拟语气+not
should not与must not
must和have to的区别 must not和can not的区别
can not 与must not
must not 与 should not的差别
must not have
Students( )study hard.can could must must not need not may s
“You should not have.
must not have been;could not have
you should not have to go 翻译
一、初一下册英语用can、can't、may、may not、must、must not完成对话(看图做).