Unit3 Grammar 课件 2022-2023学年牛津译林版八年级英语下册

Unit 3 Online tours Gromm⊙C Differences(不同)between .simple past tense and ·(一般过去时) present perfect tense ·(现在完成时) Revision Differences 1.结构不同(structures) (1)Tom went to London last year. (2)Lily has been to London twice. 一般过去时:谓语动词用动词的过去式。 现在完成时:谓语动词用“助动词have/has+过去分词” timeline时间轴 past present (now) future started and from past to ended in the present the past Have a try 请说出下列动词的过去式以及过去分词 drive do get read give Spe wi.ce 2.概念不同(concepts) ()一般过去时表示过去某个时间发生的事、存 在的状态或经常发生的动作。说话的侧重点只在于 陈述一件过去的事情,不强调对“现在”产生的影 响。 2)现在完成时表示的动作或状态与现在的情况 有联系,侧重这一动作对现在所造成的影响。 We use the simple past tense to tell what happened in the past. Daniel went to Beijing two years ago. past two years ago present We use the present perfect tense to talk about an action that started in the past and continues to the present. Daniel has lived in Beijing for two years. past two years ago present Have a try 1.三年前他参加英语课程。 He took I English course three years ago. 2.他已经参加英语课程3年了。 He has taken English course for three years. We use the simple past tense to tell what happened in the past. Daniel bought a new computer last month. past last month present We use the present perfect tense to talk about the result of an action.When the action happened is not very important. Daniel has bought a new computer. (He has a computer now.) past present Have a try 我上个月看了《少年的你》。 I watched Better Days last month. 我已经看过了《少年的你》。 I have watched Better Days already.