Childern ought ________ to treat the old with respect．A.teaching B.teach C.to be taught D.to be teaching

Childern ought ________ to treat the old with respect．A.teaching B.teach C.to be taught D.to be teaching Childern should keep _____ from danger.A.they safe B.they safety C.themselves safety D.themselves safe He ought _____(not be)late for class again. 转成被动语态The children willcleanthe clessroom tomorrowThe classroom_____ _____ _____ _____the childern tomorrowShe made me do that for herI_____ _____ _____ _____that for herWe must weater the trees every dayThe trees_____ _____ _____every da 改被动句的We can see some childern plying with fire.改为被动句.Some children _____ ______ _____plying with fire. ought to 特殊疑问句He ought to (listen to his parent).对括号部分进行提问_____ ______ he ____ _____? There ought not to be a queue for tickets at 10 o'clock yesterday,_____? Jack admitted that he ought not to have taken away the book,_____?A.oughtn't he B.ought he C.didn't he D.did he Mary is crying;you _____ her the sad news so soonA.ought not to tellB.ought to not tellC.ought not to have toldD.shouldn't tell选哪个?为什么? ought to children ought to play with nothing dangerous（保持句意不变）children _____ to play with ______ dangerous 15.You ought _____ the matter to the manager the day before yesterdayA.to report B.to have report There ought not to be a queue for tickets at this time in the evening,_____?后面怎么填? There ought not to be a queue for tickets at 10 o'clock yesterday,_____?后面怎么填? The experiment _____ last week.A.ought to be done B.ought to do C.ought to have been done D.ought to have done为什么?我选A不对吗?为什么用现代完成时?过去时不行吗?既然是应该过去做为什么不用过去完成时? rewrite sentence with same meaningWe ought to start the discussion with others next Friday. We ____ to start the discussion with _____ _____ next Fridaythanks a lot 用所给动词的适当形式填空.（1）I am very busy now.Let's ________(talk)about it on the phone this evening.(2)If you want to be thinner,you should _____(exercise)every day.(3)Childern should have free time _____(relax) at school.(4)We will ought to 和ought 的区别