Unit 3 Online tours 单元语法梳理和知识点梳理 2022-2023学年牛津译林版八年级英语下册

Unit3 Online tours 单元语法讲解与训练 一般过去时和现在完成时的区别 一般过去时和现在完成时都可以表示过去发生的动作，但是在具体的语境中，这两种时态有明显的区别： 1、 一般过去时只表示过去某个时间发生的动作或存在的状态，和现在无关，说话的侧重点在陈述一件过去发生的事情。它可和表示过去的时间状语连用，如：yesterday, last week, two years ago, just now, in 2012 等。汉译英时可加“过”、“了”等词。简言之，仅谈过去，不关现在。例： (1)I read the novel last month．我上个月看了这本小说。（只说明上个月看了，不涉及现在是否记住） (2) Tom visited China in 2009. Tom于2010年到过中国。（只说明来过，对现在没有造成影响） 2、 现在完成时表示过去发生的动作或存在的状况，但和现在有联系，强调的是对现在造成的影响或结果，它不能同表示过去的时间状语连用，通常和表示频度的副词或者表示一段时间的状语连用，如：many times, never, these days, already, since …,for…,so far 等。汉译英时可加“已经”等词。简言之，利用过去，说明现在。例： (1) I have already read the novel written by the world-famous writer．我已经读过了由世界著名作家写的小说。（已经看过，且了解这本书的内容） (2) I have been to HK many times .(去过香港许多次所以对香港很了解) 阶梯训练 一、用所给动词的适当时态填空。 1.The old man ________(sit) down and began to read his newspaper. 2. My father is a good teacher , he _______(love) all of his students. 3. The man ________(leave) the mall just now. 4. The Blacks ________(live) in the street for more than 20 years. 5. 一Look! What _____ they _______(do) over there? 一 They ________(get) ready for the sports meeting. 6. In the past few years there ____________(be) great changes in my hometown. 7. Who ________(give) us a talk tomorrow? 8. 一 It’s dangerous to swim here. Look at the sign. 一 Oh, I _________(not notice) it. Thanks for telling me. 9. 一 I called you this morning, but nobody answered. 一 My mother and I ___________(grow) flowers in my garden at that time. 10. 一 Can you give me some information about Paris ? 一 Sorry , I _________(not travel) to Paris ,so I know nothing about it . Li Hua _________(go) there last month, you can ask her. 11. Simon is lazy. He______often________(not do ) his homework carefully. 12. There ______(be) a fashion show here in a week. 13. 一 Where is Simon ? 一 I hear he _________(go) to Qingdao for his holiday. 一 Oh, how nice ! Do you know when he ________(leave)? 一 Three days ago, 14. 一Why are you still here ? It’s almost nine o’clock. 一 Because I _______