Unit1　ArtPeriod3　GrammarWriting课件（人教版选修6）.ppt

Period 3　Grammar Writing;1．陈述语气 表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。 There are two sides to every question. 每个问题都有两面性。 2．祈使语气 表示说话人对对方的请求或命令。 Will you please lend me your dictionary? 请把你的字典借给我用一下好吗？ ;3．虚拟语气 用来表示所说的不是事实，或者是不可能发生的情况，而是一种假设、愿望或建议等。 虚拟语气通过谓语动词的特殊形式来表示。 If I were a bird，I could fly in the air. 如果我是一只小鸟，我就能在空中飞行。 ;二、虚拟语气在条件句中的用法 条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设或实际可能性不大的情况，故采用虚拟语气。 If he doesnt hurry up，he will miss the bus. 如果他不快点，他将错过巴士。(真实) If he is free，he will ask me to tell stories. 如果他是空闲的，他会要求我讲故事。(真实);If I were you，I would go at once. 如果我是你，我马上就会去。(我不可能是你。非真实，虚拟语气) If there were no air，people would die. 如果没有空气，人就会死亡。(不可能没有空气。非真实，虚拟语气) ;在含有非真实条件句的复合句中，主句和从句的谓语都要用虚拟语气，其形式如下： ;1.表示与现在事实相反的情况 If I were you，I would take an umbrella. 如果我是你，我会带把伞。(事实：我不可能是你) If I knew his telephone number，I would tell you. 如果我知道他的电话号码，我就会告诉你。(事实：不知道) If there were no air or water，there would be no living things on the earth. 如果没有水和空气，地球上就不会有生物。(事实：地球上既有空气也有水);If I had any money with me，I could lend you some. 如果我带钱了，我就会借给你些。(事实：没带钱) If he studied harder，he might pass the exam. 如果他再努力些，就能通过考试了。(事实：没有努力) She looked at me as if I had been a stranger. 她看我的样子好像我是一个陌生人。(事实：我并非陌生人) ;2．表示与过去事实相反的情况 If I had got there earlier，I should/could have met her. 如果我早到那儿，我就会见到她。(事实：去晚了) If he had taken my advice，he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。(事实：没有听我的话);3．表示对将来情况的主观推测 If he should come here tomorrow，I would talk to him. 如果他明天来这儿的话，我就跟他谈谈。(事实：来的可能性很小) If there were a heavy snow next Sunday，we would not go skating. 如果下周日下大雪，我们就不能去滑冰了。(事实：不知能否下雪) If she were to be here next Monday，I would tell her about the matter. 如果她下周一来这儿的话，我就会告诉她这件事的始末。;4．当虚拟条件句的谓语动词含有were，should，had时，if可以省略，这时条件从句要用倒装语序，即把were，should，had等词置于句首。 Should he agree to go there，we would send him there. 要是他答应去的话，我们就派他去。 Were she here，she would agree with us. 如果她在这儿的话，她会同意我们的。 Had he learnt about computers，we would have hired him to work here. 如果他懂一些电脑知识的话，我们已经聘用他来这里工作了。;5．