资源描述：
《Unit 3 Section A --过去进行时讲解》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、Unit3 SectionA Whatwereyoudoing whentherainstormcame? --过去进行时讲解过去进行时基本概念：过去进行时表示在过去某一时刻或某一段时间内进行或发生的动作。基本结构：was/were+V-ing结构结构肯定句主语+be（was,were)+现在分词+其他。如：MysonwaslearningEnglishinUSlastyear.否定句主语+be(was,were)not+现在分词+其他。如：Itwasnotrainingthen.疑问句一般疑问句：Be(Was,We
2、re)+主语+现在分词+其他？特殊疑问句：1.疑问词+be(was,were)+现在分词+其他？（疑问词做主语）2.疑问词+be(was,were)+主语+现在分词+其他？现在分词的构成1)一般动词在词尾加-ing,读[iη],如go-going。2)以不发音字母e结尾的动词,先去掉e,再加-ing。come-comingmake-makingwrite-writing3)以重读闭音节结尾的动词,如果末尾以一个辅音字母结尾,应先双写这个字母,再加ing,x和w结尾的除外。如:get-gettingswim-swimm
3、ingshow-showing4)以字母y结尾的单词,直接加ing。如carryingplayingstudying5)以字母ie结尾的动词,变ie为y,再加ing。die→dyinglie→lying用法1.表示过去某一时刻正在进行的动作。今天下午5点的时候，他在打篮球。Hewasplayingbasketballat5thisafternoon.当我进去的时候，她正在写一篇作文。ShewaswritingacompositionwhenIentered.2.表示过去一段时间内持续进行的动作。昨天夜里下了一夜的雪。
4、Itwassnowinglastnight.比较：Itwassaidthatshewaswritinganovellastyear.Itwassaidthatshewroteanovellastyear.据说，她去年一直在写一本小说。据说，她去年写了一本小说。3.常用于介绍故事的背景。OnceanArabwastravelinginthedesert…过去进行时：Iwaswalkingdownthestreetwhenitbegantorain.WhenitbegantorainIwaswalkingnowIwasw
5、alkingdownthestreetwhenitbegantorain.Iwasnotwalkingdownthestreetwhenitbegantorain.Wereyouwalkingdownthestreetwhenitbegantorain?过去进行时与一般过去时的区别过去进行时表示的动作在过去某个时间正在进行,可能完成,也可能没完成。一般过去时表示动作或状态已经结束。Mary____________aletterlastnight.玛丽昨晚整晚都在写信。Mary____________aletterla
6、stnight.玛丽昨晚写了封信。waswritingwrote练习1.Idon’twanttogotothezootodaybecauseitisraining.Thesamethinghappenedyesterday.I(want,not)__togotothezoobecauseit(rain)____.didn’twant,wasraining2.I(call)____Rogeratninelastnight,buthe(be,not)____athome.He(study)____atthelibrary
7、.called;wasnot;wasstudying3.I(hear,not)___thethunderduringthestormlastnightbecauseI(sleep)____.didn’thear;wassleeping4.Mybrotherandsister(argue)____aboutsomethingwhenI(walk)____intotheroom.werearguing;walked5.WhileMrs.Emerson(read)____thelittleboyastory,he(fall
8、)____asleep,soshe(close)_____thebookandquietly(tiptoe)____outoftheroom.wasreading,fell,closed,tiptoed6.Tom___intothehousewhennoone___.A.slipped,waslookingB.hadslipped,looked
