Unit 1 Grammar教学案(现在完成时） 2023-2024学年牛津译林版英语八年级下册

8B Unit1 Past and Present Grammar 一、Fill in the blanks with the correct forms of the given verbs: 1. I __________(be) a student in NO.1 Middle School. Now, I ______________(have) an English lesson in the classroom. I usually ____________(walk) to school. But yesterday morning, when I _____________(start) to go to school, it _____________(rain) very hard. So, I ____________(go) to school by taxi. Tomorrow, if it _____________(not, rain), I _____________(ride) a bike to school. 2. I _________________(clean) the room. Now the room is clean. 3. He can’t go to the cinema tonight because he ____________(lose) his tickets. 4. ____________you ___________(hear) about the star before? 二、Discussion： 1. What tenses should we use to talk about the past? 2. What tenses should we use to talk about the present? 三、The Present perfect tense: (一)现在完成时构成 （A）肯定式 主语＋助动词have ／has ＋过去分词＋其它 1）I have/ I’ve just copied all the new words . 2）She has/ She’s lost her books ． 3）We have/ We’ve just cleaned the classroom ． 说明：这里的have ／has是________动词, 没有什么具体意义。当主语是第三人称单数时助动词用______，其余人称一律用__________。 has，have的缩略式分别为's或've。规则动词过去分词的构成与过去式的构成方式一样，不规则动词可参看不规则动词表。(P121) （B）否定式 主语＋助动词have ／has＋not＋过去分词＋其它 1) I have finished my homework. ----- I ___________ finished my homework. 2) She has travelled on the train. ---- She _______________travelled on the train. 3) They have seen the film before. -----They__________ seen the film before. 说明：现在完成时构成否定句时，只需在助动词________后面加_________就行。have not和has not的缩略式分别为__________和____________。 （C）一般疑问式 助动词Have ／Has ＋主语＋过去分词＋其它 ？ 1) They have found the lost book. _________ they ___________ the lost book? Yes, they _________./ No, they ___________. 2) She has read some of Luxun’s books. _______she _______ ______ of Luxun’s books? Yes, she _________. / No, she __________. 说明：把陈述句中的助动词_______或________放到句首，句末打问号。肯定回答用“Yes ，主语+_______．否定回答用“No，主语＋____________． （二）现在完成时的用法之一 表示过去发生或已经完成的某一动作对现在造成的影响或结果。 eg: The bottle is e