Unit1Grammar不定式(Infinitives)课件沪教版八年级英语下册

Unit1HelpingthoseinneedGrammar:Infinitives广州八年级英语语法课目录01.不定式的基本形式BasicFormofInfinitive02.Verb+to+infinitive动词后接不定式作宾语03.Verb+object+to+infinitive动词+宾语+不定式作宾补04.不带to的不定式BareInfinitive(省略to的情况)05.不定式表目的InfinitiveofPurpose(Todo/Inorderto)06.课堂练习与活动Practice&Activities导入：Whatdoweuseinfinitivesfor?LookandFindPleaseobservetheposterontheright.Canyoufindthephrasesstartingwith"to"?e.g.,tostaycleanWhatistheirfunctioninthesentence?ThinkingQuestionWhatdoweuseinfinitivesfor?语法点1：不定式的基本形式定义：不定式的基本形式是“to+动词原形”（to-infinitive）。说明：在句子中可以充当主语、宾语、表语、定语、状语等成分。例句：TolearnEnglishwellisimportant.(作主语)语法点2：Verb+to+infinitive核心结构某些动词后面可以直接跟“to+动词原形”作宾语，表达具体的动作意图。常见动词want,continue,offer,plan,decide,hope,wish,learn,agree,etc.经典例句1.Lilywantstopaintapicture.(Lily想画一幅画。)2.Heplanstovisithisgrandparents.(他计划去看望他的祖父母。)练习1：Verb+to+infinitive题目：用括号内动词的正确形式填空。1.I________(want)togotothepark.2.She________(plan)tovisitherfriend.3.They________(hope)towinthegame.参考答案：1.want2.plans3.hope语法点3：Verb+object+to+infinitive结构解析某些动词后可跟“宾语+不定式”作宾语补足语。

Subject+Verb+Object+todo常见动词encourage(鼓励)tell(告诉)ask(要求)want(想要)teach(教)allow(允许)经典例句1.Tomencouragesmetostudyhard.(Tom鼓励我努力学习。)

2.Mymothertellsmetocleanmyroom.(我妈妈叫我打扫房间。)练习2：Verb+object+to+infinitive用括号内动词的正确形式填空(Fillintheblanks):1.She______(tell)me______(wait)forher.2.Theteacher______(ask)us______(finish)ourhomework.3.Myfather______(want)me______(be)adoctor.参考答案1.tells,towait|2.asks,tofinish|3.wants,tobe语法点4：不带to的不定式核心规则Structure在感官动词和使役动词后，省略不定式符号“to”，直接跟动词原形。常见动词Verbs感官动词：see,hear,watch,notice,feel使役动词：make,let,have,help(可带to/不带to)经典例句Examples1.Isawhimgoout.(我看见他出去了。)2.Mymothermademecleanmyroom.(我妈妈让我打扫房间。)练习3：不带to的不定式题目：选择正确的动词形式填空。1.Iheardher______(sing)asong.2.Myteachermademe______(do)myhomeworkagain.3.Wesawthem______(play)footballontheplayground.参考答案：1.sing2.do3.play语法点5：不定式表目的基本用法不定式(to+动词原形)用来表示动作的目的，常翻译为“为了……”。经典例句Wewashourhandstostayclean.(我们洗手是为了保持清洁)Hestudieshardtogetgoodgrades.(他努力学习是为了取得好成绩)进阶表达可以用inorderto或soasto来加强语气，意思不变。练习4：不定式表目的请根据括号内的提示，用完整的句子回答问题。Q:Whydidtheygotothehospital?(toseeadoctor)A:Theywenttothehospitaltoseeadoctor.Q:Whydoyougetupearly?(tocatchtheearlybus)A:Igetupearlytocatchtheearlybus.Q:WhyareyoustudyingEnglish?(tocommunicatewithforeigners)A:IamstudyingEnglishtocommunicatewithforeigners.课堂活动1：对话练习活动任务分组讨论：请同学们分成小组，进行角色扮演。核心句型：使用want,plan,hopetodo结构。讨论话题：谈论你们计划做些什么来帮助有需要的人(peopleinneed)。示例对话(SampleDialogue)S1:Whatdoyouplantodotohelppeopleinneed?S2:Iplantoraisemoneytobuybooksforchildrenwithnoparents,andIhopetoraise¥300.Whataboutyou?S3:Iwanttohelpelderlypeopledotheirhousework.课堂活动2：角色扮演(Role-play)活动内容(Task)设计一个角色扮演活动，让学生扮演志愿者，用所学的不定式结构来表达他们的计划和目的。场景设定(Scenario)学校组织志愿者活动，学生们报名参加，并说明自己想做什么以及为什么想做。句型提示(Sentences)Iwantto...becauseIwanttohelp...Iplanto...to...语法总结：不定式用法基本形式结构：to+动词原形这是不定式最基础的形态。作宾语结构：Verb+todo例词：want,plan,hope,decide作宾语补足语结构：Verb+sb.+todo例词：tell,ask,encourage,allow不带to的情况结构：感官/使役动词+do例词：see,hear,make,let,watch表示目的结构：todo/inorderto用于说明动作发生的目的。核心记忆点区分todo与do重点记忆使役动词和感官动词的特殊用法。易错点提醒：不定式使用误区误区一：忘记加to❌错误：Iwantgohome.→✅正确：Iwanttogohome.误区二：错误地加to❌错误：Isawhimtogoout.→✅正确：Isawhimgoout.误区三：混淆动词搭配(接动名词)❌错误：Isuggesttogothere.→✅正确：Isuggestgoingthere.趣味小测试Question1Hewants______adoctor.

A.beB.tobeC.beingQuestion2Mymothermademe______myhomework.

A.doB.todoC.doingQuestion3Westudyhard___