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课件网) Unit 2 Grammar and usage Passive voice in the present continuous and present perfect tenses 现在进行时和现在完成时的被动 （1）现在进行时的结构： 现在进行时由“am / is / are + 现在分词”构成，即：am/ is/ are + doing He is listening to a song. 他正在听歌。 现在进行时和现在完成时 （一）现在进行时 ①表示目前（说话时）正在进行的动作，如： The teacher is giving us an English lesson now. 老师现在正在给我们上英语课。 ②表示现阶段但不一定是讲话时正在进行的动作，如： She is teaching English and learning Chinese. 她在教英语并学习汉语。 ③表示近期特定的安排或计划，如： What are you doing next Sunday 下星期你打算干什么？ (2)现在进行时的基本用法： ④go, come等表示移动的动词可用进行时代替将来时，如： I'm coming. 我要来了。 ⑤与always, often等频度副词连用，表示经常反复的行为或某种感彩，如： She is always worrying him for presents. 她总是缠着他要礼物。 reading an interesting book ①He is_____ in his bedroom. 他在他的卧室里读一本有趣的书。 ②He has told fellow students that he_____. 他跟同学说，他在写一本小说。 完成句子 is writing a novel (1)现在完成时的结构： 现在进行时由have/ has + 过去分词构成，即：have/ has done I haven’t eaten noodles for five years. 我已经5年没有吃过面条啦。 （二）现在完成时 (2)现在完成时的基本用法： ①表示动作在说话时已经完成(可不指出动作发生的确切时间)，但对现在产生某种后果或影响。常与ever, recently, before, so far, up to now, till now, in the past years, these days等时间状语连用。 Have you ever been to the West Lake 你曾经去过西湖吗？ ②表示动作发生在过去，并且一直持续到现在，甚至还可能继续下去，这时常和“since＋点时间状语(名词、短语、从句)”或“for＋段时间状语”连用。 We have lived here since I was born. 自我出生以来我们一直住在这里。 I have taught in this school for 30 years. 我在这所学校任教了30年。 ③在条件、时间状语从句中表示将来完成的动作。 He will come as soon as he has finished his work. 他一做完工作就会来。 ①In 1960 he came to London,in which city he_____ever since. 1960年他来到伦敦，自此在该城一直住到现在。 ②I _____with absolute certainty there'll be no change of policy. 我十分确定地告诉他们政策不会有变。 ③If I _____this book, I will boil coffee for you. 如果我读完这本书，我就给你煮咖啡。 has lived 完成句子 have told them have finished Make sentences with passive voice in the present continuous or present perfect tenses. construct The road is being constructed. The road has been constructed. Lead-in repair The car is being repaired. The car has been repaired. cook The dish is being cooked. The dish has been cooked. The family is decorating the tree. The tree is being decorated. The tree has been decorated. 现在进行时的被动语态 现在完成时的被动语态 一、现在进行时的被动语态 (一)含义：现在进行时的被动语态表示现在或现阶段正在进行或发生的被动动作，强调主语是动作的承受者。 A new library is being built in our city. (二)结构 1.肯定式：主语＋am/is/are＋being done Some trees are being cut down in the park. 公园里的一些树木正在被砍伐。 2.否定式：主语＋am/is/are＋not being ... ...
