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1、Unit8Grammer句子种类CategoriesofSentences1.陈述句DeclarativeSentences2.疑问句InterrogativeSentences3.祈使句ImperativeSentences4.感叹句ExclamatorySentences陈述句DeclarativeSentences指用来说明事实或说话人的看法eg.Igotoschoolbybikeeveryday.TheyarehavinganEnglishclassnow.Shedoesn'tlikeplayingbasket
2、ball.陈述句的否定形式(1)凡陈述句中，谓语部分有助动词be、havehas或情态动词can、may、must、will、shall等，其否定式只需在后面+not即可。eg.TomcanspeakEnglish.TomcannotspeakEnglish.(2)如陈述句中谓语动词只是行为动词，而没有助动词或情态动词时，其否定式要在行为动词前+donot，后面谓语动词用原形。eg.Theywenttoschoolbybikeyesterday.Theydidnotgotoschoolbybikeyesterday.
3、Shestudiesveryhard.Shedoesnotstudyveryhard.疑问句InterrogativeSentences(1)一般疑问句eg.Doesshelikemusic?(2)特殊疑问句eg.HowmuchistheT-shirt?(3)选择疑问句eg.Isyourpenfriendaboyoragirl?(4)反意疑问句eg.YouareinClass2,aren'tyou?(1)一般疑问句GeneralQuestions指以情态动词、助动词或系动词be开头的疑问句，一般疑问句需以Yes或者No
4、回答。eg.Doesshelikemusic?Yes,shedoes.Isthereamaponthewall?No,thereisn't.Didyougotoschoolyesterday?Yes,Idid.*一般疑问句的回答有时可用Certainly，ofcourse，Sure等回答。eg.MayIuseyourpen?Certainly.(2)特殊疑问句SpecialQuestions指以疑问句开始的问句常用疑问词：whowhom,whose,what,which,whenwhattime,where,why
5、,how,howmuchmany等。特殊疑问句由“疑问词+一般疑问句”构成，对主语提问时，语序与陈述句相同。特殊疑问句不用Yes或No回答。eg.Whoisthemanoverthere?HeisourEnglishteacher.(3)选择疑问句AltermativeQuestions提出两种或多种情况，要求对方选择一种。结构：一般是“一般疑问词+or+省略的一般疑问词”，或者用疑问词which，whose等提问。回答时须选择一种情况回答，不能用Yes或No回答。eg.Isthisabasketballorafoo
6、tball?It'sabasketball.Whichisyourbag,theblueoneortheyellowone?Theblueone.（4）反意疑问句DisjunctiveQuestions表提问者有一定主见，但没把握，希望对方来证实。反意疑问句由两部分构成：前一部分是对事物的陈述，后一部分是省略型的简单句。前肯后否或者是前否后肯，两部分时态要一致。*对反意疑问句的回答：不管问题的提法如何，事实是肯定的，要用Yes，事实是否定的，要用No。eg.YouarefromAustralia,aren'tyou?N
7、o,I'mnot.I'mfromCanada.Shedidn'tvisitherauntyesterday,didshe?Yes,shedid.3.祈使句ImperativeSentences用来表命令、劝告等。说话对象是第二人称时，you常被省略。句末用句号或是感叹号。（1）祈使句的开头用动词原形eg.Sitdown,please.Closethedoor,please.(2)祈使句的否定式在句首用Don't，有时用Never。eg.Don'tputtheflowersonthetable,please.Neverd
8、oitagain.4.感叹句ExclamatorySentences多用how或what引起，来表达强烈的感情。（1）“How+adj.或adv.+主语+谓语！”eg.Hownicetheflowersare!（2）“What+a（an）+adj.+单数可数名词+主语+谓语！”eg.Whatabigappleitis!（3）“Wh
