【最新】牛津译林版八年级英语下册Unit 1 Past and Present Grammar精品课件(共28张P

8B Unit 1 Past and PresentGrammar

Learning aims1. To master the structure and basic usage of present perfect tense(PPT).(掌握现在完成时的基本结构、用法。)

2. To learn the rules of forming the past participle of verbs.(学习动词的过去分词变化规则。)

3. To learn some time expressions usually used in PPT.(学习常用在现在完成时里的时间表达方式。)

Lead-in Ask and answer1. How long has Mr. Chen lived in Sunshine Town? He has lived here since he was born. 2. Can Mr. Chen see his old friends as often as before? No. Because most of his old friends have moved away.

have + done(动词过去分词)

Pre-task: More examplesTry to find more sentences with "have/ has+ done" in the book.

I've just eaten it. You've changed. We have lived here since then. Have you seen my food? Have you ever moved house? Has the town changed a lot over the years? · · · · · ·

While-taskTask1: Learn by yourselvesWhen do we use present perfect tense?

We use the present perfect tense to talk about an action that started in the past and continues to the present.表示过去开始，现在还在继续的 动作。

We use the present perfect tense to talk about an action that happened in the past and has a connection with the present.

表示过去发生的或已完成的动作对现在造成的影响或结果。

Eddie has eaten my food.

Past

present

Task2: Group workDiscuss: What's the basic structure of PPT?have / has + (not) (助动词)have (not) has (not)

Subject (主语)

past participle (过去分词)moved. moved.

I/You/We/They He/She/It

一般疑问句Have/ Has + 主语 + 动词的过去分词？Have I/you/we/they moved?

HasYes,

he/she/it I/you/we/theyhe/she/it I/you/we/they he/she/it

have.has. have. not/haven’t. has not/hasn’t.

No,