Unit 1 Using language 课件-2022-2023学年高中英语外研版（2019）选择性必修第四册

新外研社高中英语选择性必修四Unit 1 Looking Forwards Using Language Grammar 2 1. For many of us, it’s something we already have experienced. 2. What will we be doing in ten years’ time? 3. He would later go on to win the Nobel Prize in Literature. 4. ... the young Arthur Conan Doyle, born in Scotland in 1859, had originally worked as a doctor. 5. Interestingly, Doyle wrote some of his early Holmes stories while he was waiting for patients in his medical practice in London. 6. ...but Sherlock Holmes has been entertaining readers for well over a century. Observation The Present Perfect Tense The Future Continuous Tense The Past Future Tense The Past Perfect Tense The Past Continuous Tense The Present Perfect Continuous Tense 1. 一般现在时 （1）表示经常性、习惯性的动作或存在的状态，常与often, always, sometimes, every day, usually等时间状语连用。 I brush my teeth twice a day. （2）表示客观真理、客观存在、科学事实、俗语等. Light travels faster than sound. （3）表示按规定、计划、安排、时间表等马上要发生的事，通常有表示将来的时间状语。该用法仅限于少数表示短暂意义的动词，如begin, start,end, finish, stop, go, come, leave, sail, arrive, return, close, open 等 1. 一般现在时 The plane leaves at three sharp. 飞机3 点整起飞。 （4）表示现在正在发生的动作或存在的状态。 Here comes John.（=John is coming）！ （5）在时间、条件、方式、让步状语从句中用一般现在时表示将来，主句用一般将来时。 Anything will become boring if you do it repetitively. （6）书报的标题，故事的叙述，小说、戏剧、电影等情节介绍，图片的说明等常用一般现在时表示或说明过去的事。 2. 一般过去时 （1）表示在过去确定的某个时间里所发生的动作或存在的状态。常用的时间状语有：yesterday, last week, in 2015,an hour ago, the other day等。 It was a terrible piece of work you turned in yesterday.昨天你提交的作品糟糕至极。 （2）表示在过去一段时间内经常性或习惯性的动作。 （3）表示过去时间内连续发生的动作。 She took off her coat and sat in the sofa. 她脱了外套，坐在沙发上。 2. 一般过去时 （4）有些动作发生的时间没有具体表明，但实际上是“刚才，刚刚”发生的，应使用一般过去时，如 “I didn’ t know/expect...”或“I forgot...”等，表示事先不知道或不记得，但现在已经知道或记得的事情。 I didn’t expect to meet you here.我没料到会在这里碰见你。 （5）在时间和条件状语从句中，若主句用了过去将来时，从句常用一般过去时代替过去将来时。 He said he would not go if it rained.他说过如果下雨，他不会去的。 3. 一般将来时 （1）“will/shall+动词原形”结构：表示客观上势必将发生的事情或临时做出的打算。shall一般用于第一人称，will可用于各种人称。常与next week, tomorrow, before long, in the fu