doesn't,isn't,wasn't,hasn't区别以及用法

doesn't,isn't,wasn't,hasn't区别以及用法 this machine___.it hasn't worked for yearsdidn't work wasn't working doesn't work isn't workingw为什么 She's back from Australia,_C__ she A wasn't B doesn't C isn't D hasn't She's just back from school ,____she 选项 A.isn't B.doesn't C.hasn't D.wasn't comeputers are very useful in our lives,()they?A isn't B wasn't C doesn't D aren't She’s read the story, _____she?A. hasn’t B. isn’t C. doesn’t D. wasn’t isn't doesn't的用法 isn't aren't don't doesn't的区别! he ()any classes last week.A.doesn't have B.didn't have C.isn't have D.wasn't have Lovely weather,______it?—Yes,it is warm today.A.doesn’t B.isn’t C.won’t D.wasn’t就是反义疑问句的用法啊? He's read this book before ,< A hasn't he B doesn't he C isn't he D wasn't he老师复印的卷 Benny's used to walking after supper,_____he? a. wasn't b. hasn't c. isn't d. doesn't请注理由 She's been teaching for five years,( )A.isn't she B.wasn't she C.hasn't she D.doesn't she 英语选择题isn't wasn't doesn't haven't①具体的用法②当他们出来时在什么时刻用他 英语 —Look at the sign on the right.—Oh,parking ____________hereA.doesn’t allow B.isn’t allowed C.didn’t allow D.wasn’t allowed he's fed the dog and the cat ,__?a.doesn't he b.isn't he c.wasn't he d.hasn't he this machine__.it has not worked for yearsA didn't work B wasn't workingC doesn't workD isn't working He used to be a teacher,( A.isn't he B.doesn't he C.didn't he D.wasn't he