英语人教版八年级下册unit9 grammar focus.pptx

动词的现在完成时态的结构(一）2017.06.20马马号中学：邰秀武号中学：邰秀武20172017年年0606月月2222日日完成下列空格1、她经常观看龙舟赛。She often (watch)dragon boat.2、她明年去施洞看龙舟赛。She (go)to Shidong to watch dragon boat next year.3、他正在看龙舟赛。She (watch)dragon boat now.4、昨天我看龙舟赛。I (watch)dragon boat yesterday.5、我看过龙舟赛。I (watch)dragon boat.完成下列空格1、她经常观看龙舟赛。She often watches (watch)dragon boat.2、她明年去施洞看龙舟赛。She will go(go)to Shidong to watch dragon boat next year.3、他正在看龙舟赛。She is watching(watch)dragon boat now.4、昨天我看龙舟赛。I watched(watch)dragon boat yesterday.5、我看过龙舟赛。I have watched (watch)dragon boat.动词的现在完成时态的结构(一）学习目的：1.理解动词 的现在完成时态的意义。2.掌握动词现在完成时态的结构形式。3.掌握动词的过去分词的结构变化规律。4掌握动词的现在完成时态在句子中的结构形式。（一）、动词的现在完成时态的意义及其结构形式。1.意义及结构形式：现在完成时态是指到现在为止已经发生了某事（或者发生了某动作）。句子的谓语动词的结构形式由“have/has+动词的过去分词”构成，表示“已经发生了（某事或者某动作）”，其中have/has是助动词，无意义，只是用来帮助构成时态，可以理解为“已经”I have a book/I have breakfast at 7:00.（句中have是实意动词）I have finished(finish)my homework.2.动词过去分词的构成1）.有规则。（1）一般情况下，动词词尾加-ed,如：workworked playplayed wantwanted askasked（2）、以不发音的-e结尾动词，动词词尾加-d,如：livelived movemoved tastetasted（3）、以“辅音字母+y”结尾的动词，把y改成i,加ed,如：studystudied trytried copycopied carrycarried（4）、重读闭音节，末尾只有一个辅音字母，先双写该辅音字母，再加“ed”。如，stopstopped dropdropped planplanned2.不规则（参见课本后面不规则动词表）（二）.动词的现在完成时态在句子中的结构形式。1.陈述句中的肯定句。主语+have/has+动词的过去分词+其它。例：I (finish)my homework.我已经完成了家庭作业。2.陈述句中的否定句。主语+have/has+not+动词的过去分词+其它。例：I （finish not)my homework.我还没有完成我的家庭作业。3.一般疑问句。Have+主语+动词的过去分词+其它？（二）动词的现在完成时态在句子中的结构形式。1.陈述句中的肯定句。主语+have/has+动词的过去分词+其它。例：I have finished(finish)my homework.我已经完成了家庭作业。2.陈述句中的否定句。主语+have/has+not+动词的过去分词+其它。例：I have not finished （finish not)my homework.我还没有完成我的家庭作业。3.一般疑问句。Have+主语+动词的过去分词+其它？例:(finish)your homework?Yes,I ./No,I .3.特殊疑问句。特殊疑问词+一般疑问句？即，特殊疑问词+have/has+主语+动词的过去分词+其它？例：I have finished my homework.(针对画线提问）?例:Have you finished(finish)your homework?Yes,I have./No,I have not.3.特殊疑问句。特殊疑问词+一般疑问句？即，特殊疑问词+have/has+主语+动词的过去分词+其它？例：I have finished my homework.(针对画线提问）What have you finished?（三）课堂练习。按要求完成下列各题。1,填空:They already (wash)their clothes2,把 1 改为否定句。They their clothes yet.3,把 1 改为一般疑问句并回答。already their clothes?Res,they /No,they 4,针对 1 画线提问。they already their clothes?（三）课堂练习。按要求完成下列各题。1,填空:They have alreadywashed(wash)their clothes2,把 1 改为否定句。They have not washed their clothes yet.3,把 1 改为一般疑问句并回答。Have they already finished their clothes?Res,they have/No,they have not4,针对 1 画线提问。What have they already washed their clothes?四、强化练习。1、写出下列动词的过去分词。want ask live study try stop2、完成下列空格。1、he (finish)his work today?Res,he has.（填空）2、They have lived here since 2000.(对划线部分提问)have they lived here?3、You have played the game.（变为否定句）You played the game .四、强化练习。1、写出下列动词的过去分词。wantwanted askasked live lived studystudied try tried stopstopped 2、完成下列空格。1、Has he fibished(finish)his work today?Res,he has.（填空）2、They have lived here since 2000.(对划线部分提问)How long have they lived here?3、You have played the game.（变为否定句）You have not played the game .（五）课外作业