英语人教版八年级下册Grammar-present pefert tense.docx

Grammer - present perfect tenseTeaching aims:1. Knowledge: a. The structure of the present perfect tense.b. The usages of present perfect tense. 2. Ability: a. Enable students to use the correct tense in their writing and speaking. b. Enable students to use the right words in the present perfect tense. 3. Feelings and attitude:a. Let the students know the importance of English grammar. b. Try to build up studentsconfidence in themselves c. Encourage students to speak English in public. . Important Points: a.let the students understands the usages of present B.perfect tense. . Difficult Points: Help students use present perfect tense with verbs to describe events happen at a particular point in time and to describe events that can continue over a period of time. .Teaching methodology: The New Senior English Curriculum Standards aims education for all students and stressed quality-oriented education. The main task of education is to stimulate and cultivate students interest and their confidence in learning the language, help them develop good learning habits and form effective learning strategies, facilitate autonomy and cooperative spirit in learning ,enable students to master basic English language knowledge and skills in listening, speaking, reading and writing. According to the new standards, the students should be the center of the class and the teacher serves as a controller, organizer, participant, or resource-provider most times. Considered with the characteristic of the teaching contents and the learners, I will apply explanation and practicing in my teaching. Most of the usages will be summarized by students themselves. .Teaching aids A computer, a projector, black board, chalks . Teaching procedures: Step1. Revision & lead-in (2min) 1.Review the tense they have learned.2. Show some sentences on the board. Step2. Present perfect tense 1. The structure of present perfect tense. After reading these sentences, ask students to find the structure of these sentences with present perfect tense. 2. The usage of present perfect tense Play the flash and tell students to recall the main usages of this tense. Draw a time line on the blackboard: 1) . Usage1: “完成用法” 强调过去发生的动作对现在造成的影响或结果，常用状语有：already, yet, never, ever, just, before . Show the following sentences and have students summarize the difference between the past simple tense and present perfect tense. show two pictures and guide students to describe them with present perfect tense. 2) Usage2: “未完成用法” 表动作或状态已开始，持续到现在，可能还会继续进行下去，常用时间状语since+时间段ago/时间点/从句, for+时间段,since then,ever since,so far,up to now. Step3. Two kinds of verbs 1. The definitions 2). Show two groups of words and lead students to get the definitions. 短暂性动词: 表示短暂的运动状态（瞬间完成或延续时间很短的动词).延续性动词:表示持续的行为或状态的动词,能和表示一段时间的状语连用. show a picture and guide students to describe them with present perfect tense. Step3. Two kinds of verbs 1. The definitions 1). Lead in this part by asking students a question: Q: the pig said “Its died for a couple of days” first, then he changed it to “Its been dead for a couple of days”, do you know the reason why the first sentence is wrong? 现在完成时的未完成用法只适用于延续性动词，短暂性动词的现在完成时的肯定式不能和表示一段时间的状语连用。 2. Replacement of these two kinds of verbs Help students know the corresponding verb of verb describing events