七年级英语下册语法课件

Grammar coursewareforGrade7EnglishVolume2•The PluralForm Nouns•The presentcontinuous tenseofverbsCATALOGUE•The comparative and superlative目录forms of adjectives•The usageof prepositions•Object clause•adverbial clauseof condition01The PluralFormNounsweak conjugationWeaknouns formOther examples:their pluralsby dog,fox,box.adding-s or-es.E xa mp le:c atsingular-catsplural.Irregular changesSomenouns haveirregular Example:man singular-Other examples:woman,plural forms.men plural.child,tooth,foot.Special circumstancesSomenouns havespecial Example:mouse singular-Other examples:louse,roof,plural forms.mice plural.hoof.02The presentcontinuoustense ofverbsDefinitionand Structure总结词掌握现在进行时态的定义和结构是学习英语语法的基础详细描述现在进行时态表示正在进行的动作或状态，其基本结构为“be动词+动词的现在分词”常用的助动词包括“am”、“is”、“are”、“was”、“were”，动词的现在分词形式通常是在动词后面加“-ing”Usage andexample sentences总结词通过例句掌握现在进行时态的用法是关键详细描述现在进行时态常用于描述当前正在发生的动作，如“I amstudying Englishnow”也可以表示即将发生的动作，如“She isleaving forNew Yorknext week”此外，还可以用于描述现阶段反复发生的动作，如“Weare meetingevery Tuesday”The differencefrom thesimple presenttense要点一要点二总结词详细描述理解现在进行时态与一般现在时态的区别是避免语法错误现在进行时态与一般现在时态都表示现在的状态或动作，的重点但两者用法有所不同一般现在时态表示经常性、习惯性的动作或状态，如“I usuallywalk to school”而现在进行时态强调当前正在发生的动作或状态，如“I amwalkingtoschoolnow”此外，一般现在时态也可以表示将来的动作或状态，如“The trainleaves at10:00tomorrow”03The comparative andsuperlative formsofadjectivesWeak conjugationWeakconjugation refersto theThis ruleapplies tomost adjectives,For example,happy becomesformationof thecomparativeandbut thereare exceptions.happier andhappiest.superlative formsofadjectivesbyadding-er and-est tothe endofthe adjective.Irregular changesSomeadjectives haveirregular changesin theircomparativeandsuperlativeforms.These changesare notconsistent andmust bememorized.For example,good becomesbetter andbest,while badbecomesworse andworst.Comparative andsuperlative usageand examplesentencesThecomparative form is used to comparetwo thingsor people,showing thedifference inquality or quantity.The superlativeformisused tocompare morethan twothings orpeople,showing thehighest orlowest qualityorquantity.Example sentences:She istaller thanher sister.comparativeform andThis isthe tallestbuilding inthe city.superlativeform.04The usageofprepositionsRepresenting timePrepositionsare commonlyused todescribe timerelationships.Prepositions likebefore,after,at,and inare oftenused to specify atime frameor eventorder.For example,I willmeet youafter themovie orI willarrive at5oclock.Indicating locationPrepositionsare used tospecifypositions orlocations.Common prepositionsfor indicatinglocation includein,on,under,and nextto.For instance,The bookis onthe tableor Thecat isunderthe bed.Indicating directionPrepositionscan beusedtoshow movementor direction.Prepositions liketo,towards,and fromare oftenusedtoindicate adestination ormovement.For example,I amgoing towardsthe parkor Shecame fromNew York.05Object clauseDefinitionand Structure定义宾语从句是一种句子结构，其中宾语是一个完整的句子结构宾语从句通常紧跟在动词或介词之后，使用连词引导Usage ofguide words使用引导词常用的引导词包括that、what、which、who、when、where等注意事项使用正确的引导词是构建宾语从句的关键，需根据从句的内容和上下文选择合适的引导词Notes andexample sentences注意事项在宾语从句中，需要注意时态和语序，通常使用陈述句语序，并保持时态一致例句I dontknow wherehe lives.我不知道他住在哪里06adverbial clauseofconditionDefinition andStructure总结词条件状语从句的定义和结构详细描述条件状语从句用于表示某个条件下的结果或假设情况，其结构通常由引导词if或unless以及一个从句组成Usage ofguide words总结词详细描述条件状语从句中常用引导词的用法在条件状语从句中，常用的引导词有if、unless、in case、provided thatVS等，它们用于引导条件状语从句，表示某个条件下的结果或假设情况Notes andexample sentences总结词条件状语从句的注意事项和例句详细描述在理解和使用条件状语从句时，需要注意区分真实条件和虚拟条件，以及注意时态和语序的正确使用以下是一个例句If itrains tomorrow,we willcancel thepicnic.（如果明天下雨，我们将取消野餐）感谢您的观看THANKS。