1、Unit 13单元语法专题语法知识专讲1.现在进行时(1)概念：表示现阶段或说话时正在进行的动作及行为。(2)时间状语：now,at this time,these days等。(3)基本结构：am/is/aredoing(4)否定形式：am/is/arenotdoing(5)般疑问句：把be动词放于句首。(6)特殊疑问句：把疑问词what，how，where等放于句首。e.g.:How are you feeling today？你今天感觉怎么样？2.被动语态(1)性质：当主语为动作的承受者时，谓语要用被动语态，动作的执行者由by引出。当我们不知道谁是动作的执行者或只需强调动作的承受者时，需
2、用被动语态。(2)基本结构：主语be动词的过去分词其他.e.g.:We are allowed to go out.我们被允许外出。(3)否定形式：主语benot动词的过去分词其他.3.现在完成时(1)概念：过去发生或已经完成的动作对现在造成的影响或后果；或从过去已经开始，持续到现在的动作或状态。(2)时间状语：recently，lately，since，for，in the past few years等。(3)基本结构：have/hasdone(4)否定形式：have/hasnotdone(5)一般疑问句：have/has提前。e.g.：Have they been to the UK t
3、wice？他们去过英国两次吗？4.情态动词(1)情态动词不同于行为动词，情态动词只是表达一种想法(如能、也许、敢)，而行为动词表示的是可以通过行为来表达的动作(如读、跑)。e.g.：I can run faster than him.我可以跑得比他快。(2)情态动词是一种本身有一定的词义，表示说话人的情绪、态度或语气的动词，但不能单独作谓语，只能和其他动词原形构成谓语。e.g.:We can be there on time tomorrow.我们明天可以按时到那儿。You must obey the school rules.你必须遵守校规。语法知识专练一、单项选择。()1.(2019青岛)
4、As middle school students,we follow the public rules wherever we go.A.wouldB.shouldC.might D.could()2.(2019河北)These cakes_ with chocolate.Have one,please.A.fill B.filledC.are filled D.were filledBC()3.(2019淮安)What is your mother doing,Linda?She _ dinner in the kitchen now.A.is cooking B.was cookingC
5、.cook D.cooking()4.(2019黔西南、黔南、黔东南)How many letters_you_to your mother?109 in all,since 2016.A.has；written B.have；writtenC.did；write D.are；writingAB()5.(2019武威)Dont forget to_the lights when they are not in use!A.turn over B.turn offC.turn up D.turn on()6.(2019昆明)With the rapid progress in high tech
6、nology,5G_around most parts of China in the near future.A.is used B.is usingC.will use D.will be usedBD二、根据汉语提示完成下列句子(每空词数不限)。1.You_(必须支付)all the bills.2.Can you_(买得起)a new car?3.Wang Shuang _(参加)many European football games.4.We_(正在采取行动)to protect our environment now.must pay forafford(to buy)has taken part inare taking actions
