1、Unit6 SectionA Grammar Focus-4c 精品教案 Step 1 Warm up Read the following sentences we have seen. Have you read Little Women yet? Yes, I have./ No, I havent. Has Tina read Treasure Island yet? Yes, she has. She thinks its fantastic. Have you decided which book to write about yet? Yes, I have. Ive alrea
2、dy finished reading it. It was really good. Step 2 现在完成时 用法 1. 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 e.g. Have you had your lunch yet? Yes, I have. Ive just had it. (现在我不饿了。) 2. 表示动作或状态从过去某一时刻开始，一直延续到现在，而且可能还要继续 下去。 e.g. I havent seen her these days . Ive known Bob for three years . I ve been at this school f
3、or over two years. 时间状语 already, yet, just, ever, never, before 构成 现在完成时是由“ 助动词 have / has+ 动词的过去分词” 构成的，规则 动词的过去 分词构成与 过去式相同，不规则动词的过去分词则需逐个记忆。 动词的过去式的变化和过去分词的变化并不完全相同。我们对它们作了一个大 致的分类。 (注：例子中单词的变化顺序为：动词原形 动词的过去式 动词的过去分词) 一、过去式和过去分词的变化相同 规则变化： 1. 一般在动词词尾直接加 ed。如：pick picked picked; wish wished wished
4、; stay stayed stayed 2. 以不发音的 e 结尾的动词后面加 d。如：like liked liked; hope hoped hoped; phone phoned phoned 3. 以“辅音字母 + y”结尾的动词，变 y 为 i，再加-ed。如：study studied studied; hurry hurried hurried; reply replied replied 4. 词尾只有一个辅音字母的重读闭音节动词，要双写辅音字母，再加-ed。如： stop stopped stopped; clap clapped clapped 不规则变化： 5. 以不变
5、应万变。如：let let let; put put put; read read read 6. 若中间有双写 e，则去掉一个 e，单词末尾再加 t。如：feel felt felt; keep kept kept; sleep slept slept 7. 结尾的字母 d 变 t。如： lend lent lent; build built built; send sent sent 8. 变为以-ought 或-aught 结尾。如：buy bought bought; bring brought brought; catch caught caught; teach taught ta
6、ught 句式 1. 肯定句：主语 + have / has + 过去分词 (+ 其他 ) 2. 否定句：主语 + have / has + not + 过去 分词(+ 其他) 3. 一 般疑问句：have/ has + 主语 + 过去分词(+ 其他) 来 4. 特殊疑问句： 1) 特殊疑问词 (不是句子主语) + have / has + 主语+过去分词 (+ 其他) 2) 特殊疑问词( 是句子主语)+have / has+过去分词(+ 其他) already 和 yet 都可以作为现在完成时的标志词，但它们的用法不同。 already 一般用于肯定句中。如： We have already
7、 cleaned up our classroom. 注意：already 用于疑问句中时通常表示惊奇。如： Have you finished your homework already? I cant believe it. yet 一般用于疑问句和否定句中。如： Have you seen her yet? The bus hasnt come yet. 活学活用 Write the forms of the past tense and past participle: drink _ _ see _ _ find _ _ leave _ _ tell _ _ Why is Mr. Y
8、ang still in the teachers office? Maybe he _ his work yet. A. doesnt finish B. hasnt finished C. havent finished Step 3 Exercises 1. Finish 4a and check the answers. Keys: I have just drunk some tea. Have you found it? He has already left. did he leave She has already seen the film havent told them
9、yet 2. Finish 4b and check the answers. Keys: loves, has read, will be, finished, will write, hasnt read 3. Finish 4c and check the answers. Make conversations and complete the chart. (Follow the conversation on page 60) Step 4 中考链接 ( )【2013 广西贵港】 Do you know t he movie Lost in Thailand? Yes. I _ it twice. Its funny. A. saw B. see C. have seen D. will see ( )【2013 黑龙江牡丹江】 Lunch? No, thanks. I_. A. will eat B. am eating C. have eaten ( )【2013 湖北黄冈】 Where is Tom? We cant find him anywhere. Perhaps he _ home. A. has come B. is going C. went D. was going Keys: CCA
