现在进行时和过去进行时

现在进行时与过去进行时现在进行时：表示现在正在进行的动作或状态。构成：肯定式：be(am,is,are)+doing否定式:am/is/arenot+doing疑问式:Is/Are+主语+doing?标志词:now,look,listen,ateightEg:Look!Tomisplayingchesswithhisgrandfather.It’seightnow.WearehavinganEnglishlesson.一、将下列句子改为否定、疑问句并回答。1.I’mwritingalettertomyfriendnow.否：________writingalettertomyfriendnow.问：_________writingalettertomyfriendnow?Yes,_________.No,_________.2.Theyarecleaningtheclassroom.否:They_________theclassroom.问:_____they_____theclassroom?Yes,________.No,_________.二、用所给单词的正确形式填空。1.What____you____(do)now?I____(swim).2.____yourfather____(read)anewspapernow?Yes,he___.No,he____3.Look!Who_____(give)atalk4.Listen!MikeandKate___________(sing)5.He____________(read)now.He_________(notwrite)Whataretheydoingnow?Theyareplayingfootball.Whatweretheydoingyesterday?Theywereplayingfootball.Whataretheydoing?TheyarerunningHeisplayingtheguitar.Theyaredancing.Heisswimming.Isheswimming?Yes,heis./No,heisn’t.过去进行时怎么说?现在进行时由am/is/are+doing构成.想一想,过去进行时的构成是怎样?was/were+doing请看下面的句子：Iwasplayingbasketball.Iwasnotplayingbasketball.Wereyouplayingbasketball?Yes,Iwas./No,Iwasnot.想一想,把I改成He/They要怎样说呢?过去进行时的否定式:was/werenot+doing过去进行时的疑问式:Was/Were+主语+doing?标志词:then,atthat/thistime,ateightyesterday,WhenIcamein,amomentagoEg:1.Myfatherwasreadingnewspaperatnineyesterday.2.LiLeiwastalkingwhentheteachercamein.主句(过去进行)从句(过去时)3.WhileLiLeiwastalking,theteachercamein.从句(过去进行)主句(过去时)IwaslisteningtothemusicwhileIwasdoingmyhomework1.It___________(rain)whenIwentoutyesterday.2.Myfather__________(play)abasketballmatchatninelastnight.3.They__________(practice)singingatthattime4.Whilehe__________(read),he_________(listen)tothemusicyesterday.5.Hesaidhe____________(clean)theroomatthattimewasrainingwaswatchingwerepracticingwasreadingwaslisteningwascleaning