3、Oughthetogothere?他应该去那里吗?[练习]1). He___________oughttobehomebynow.目前他应该在家了吧。2)You ___________ought to takecareofhim你应该照顾他。3).You___________________oughtn'ttosmokesomuch.你不应该吸那么多烟4).____________________Oughtwetodoitatonce?我们应该要立刻做这件事?二.情态动词need的用法Eg:1. Need he bring his laptop tomorrow? 明天他需要带他的笔
4、记本过来吗?2. You needn't worry about it because it's not your fault. 你不必担心,因为那不是你的错。3. —NeedIdothecleaningnow?—Yes,youmust.—No,youneedn’t.[用法归纳]1.need既可作行为动词也可作情态动词。在情态动词时,表示“需要”“必须”,通常用于_______________(如例1)或_________________(如例2)中,无人称和数的变化。________________________________________thishomeworkfirst
6、omeworkfirst?needn'tdoitagain用于一般疑问句时,肯定回答一般用must,否定回答用needn’t。Needmustneedn’t[练习]1._____________Needhesayitagain?需要他再说一次吗?2.He______________needn'tworryaboutit.这件事他无需担心。3.——Need I finish my work today?——No,you________..needn't三.情态动词+havedone的用:1:表示对过去的推测回想:表示推测的情态动词,按照语气强弱依次排列为_______must→____