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课件网) Unit 8 Have you read Treasure Island yet Section A (Grammar Focus-4c) By the end of this period, you will be able to 1.learn about the past participle forms of verbs; 2.know the structure and functions of the Present Perfect Tense; 3.use “already” and “yet” in the Perfect Tense; Grammar Focus 读下列句子，能否总结出句子中包含的语法？ Have you read Little Women yet Yes, I have./ No, I haven't. Has Tina read Treasure Island yet Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet Yes, I have. I’ve already finished reading it. It was really good. 主语 + have / has + 动词的过去分词 Grammar 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 a. 表示过去发生或已经完成的动作对现在造成的影响或结果； b. 表示开始于过去某一时间且持续到现在的动作。 时间状语 already (已经), just (刚刚), ever (曾经), never (从不), before (以前), yet (仍然)等。 Grammar 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 Grammar 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 结构： 助动词 I have already finished reading it. finish-finished-finished decide-decided-decided be-was / were-been find-found-found bring-brought-brought lose-lost-lost teach-taught-taught cut-cut-cut read-read-read 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 结构： finish-finished-finished kill-killed-killed stop-stopped-stopped die-died-died study- studied-studied 过去分词的变化： 规律变化 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 结构： read-read-read put-put-put cut-cut-cut hurt-hurt-hurt let-let-let cost-cost-cost 过去分词的变化： 不规律变化 A-A-A 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 结构： think-thought-thought find-found-found teach-taught-taught lose-lost-lost buy-bought-bought tell-told-told bring-brought-brought meet-met-met 过去分词的变化： 不规律变化 A-B-B 主语 + have / has + 动词的过去分词 Present Perfect Tense 现在完成时态 结构： 大多数形容词有三个级。 1. 原级: Structure : as ... as... 像..….一样 e.g. Tim is as tall as Tom. 2. 比较级 (用于两者之间的比较): Structure：形容词比较级＋ than ... e.g. This box is bigger than that one. 形容词和副词的比较级和最高级 3. 最高级(用于三者或三者以上的比较): Structure: the + 形容词的最高级＋of / in ... e.g. Tom is the heaviest in our class. He is the most popular in our school. 3) 最高级(用于三者或三者以上的比较)， 常用结构: the + 形容词的最高级＋of / in ... He is the tallest of the three. 他是这三个人中最高的。 He is the funniest in his class. 他是他们班最有趣的。 规则变化 1) 一般情况下，单音节或双音节的形容词/副词比较级＋er， 最高级＋est。如: clever — cleverer — cleverest few — fewer — fewest small — smaller — smallest 等。 形容词、副词的比较级和最高级 规则变化和不规则变化 2) 以e结尾的词，比较级＋r，最高级＋st 即可。 如： nice — nicer — nicest cute — cuter — cutest large — larger — largest 3) 以辅 ... ...
