英语语法-助动词.ppt

,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,助动词,1.must:,Must we hand in our exercises tomorrow?,Yes,you must.,No,you needn,t.,2.Will/shall,用于祈使句,:,Lets go together,shall we?,Do me a favor,will you?,3.,与,needn,t,相当的动词形式是,don,t need to/don,t have to/haven,t got to,:,You,needn,t do it,at once.,You,don,t need to do it,at once.,You,don,t have to do it,at once.,You,haven,t got to do it,at once.,过去时形式通常是：,You,didn,t need to do it,at once.,You,didn,t have to do it,at once.,4.will/would:,That will be John,no doubt.,That would be John,I expect.,=That must be John.,=That may be John,I think.,注意：,will,表示肯定；而,would,表示的语气不肯定。,II.Learning Points,5.,“,It seems/happens/appears/chances that,”,It seems/ed that:,It seemed that the boy was late.,=The boy seemed to be late.,It happens/ed that:,It happened that he was working at the office,when I called.,=He happened to be working at the office,when I called.,II.Learning Points,7.,“,It is/was,that/who,”,(,强调句型,),：,It is you who have done it.,It was he that broke the glass.,It was yesterday that they played the game.,It is in Beijing that my son works.,