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1、GrammarUnit4Savethetrees1.现在进行时的定义(Thepresentcontinuoustense)①现在进行时态表示现在(说话瞬间)正在进行或发生的动作。如：Thestudentsarelisteningtotheteacher.HeiswatchingTVnow.②现在进行时态还可以表示当前一段时间内的活动或现阶段正在发生的事情。如:Weareworkingonafarmthesedays.Iamwritingabookthismonth.ISheHeTheboyTheyThegi
2、rlsbebebebebebeamisisisarearesingwashdoesreadsdoeswatchTV.homework.books.exercise.thedishes.intheroom.inginginginginging请找找规律：现在进行时标志词：nowlooklisten2、现在进行时的谓语结构be+现在分词(V-ing)ISheHeTheboyTheyThegirlsamwatchingTV.isisisarearedoinghomework.readingbooks.doinge
3、xercise.washingthedishes.cleaningtheroom.??????请找找规律：怎样变否定句和一般疑问句？notnotnotnotnotnot3.现在进行时的句式1.肯定句:主语+am/is/are+V-ing+其它.如:Iamreadingabookinthelibrary.2.否定句：直接在am/is/are后加not如：Iamwriting.Iamnotwriting.3.一般疑问句及回答:问句,直接把am/is/are提句首,若原句有第一人称，把第一人称变成第二人称。肯定回
4、答:Yes,主语+be(be是要变化的，即am/is/are).否定回答:No,主语+be+not.Youaredrawingapig.(变一般疑问句，再作肯定回答和否定回答）---Areyoudrawingapig?---Yes,Iam./No,I’mnot.特殊疑问句：对be+V-ing提问要用what.格式为：What+am/is/are+主语+doing?4.与现在进行时连用的时间状语：atpresent目前;现在atthemoment此刻,现在rightnow此刻,现在;立刻,马上now现在提示语
5、:look,listen根据题目要求，完成下列句子。1.Theyaredoingthehouseworknow.(分别改成一般疑问句和否定句)Aretheydoingthehouseworknow?Theyaren’tdoingthehouseworknow.Practice2.Thestudentsarecleaningtheclassroom.(改为一般疑问句并作肯定和否定回答)Arethestudentscleaningtheclassroom?Yes,theyare.No,theyaren’t.3.
6、I’mplayingfootballintheplayground.(改为否定句)I’mnotplayingfootballintheplayground.4.Tomisreadingbooksinhisroom.(改为一般疑问句)IsTomreadingbooksinhisroom?ThepresentcontinuoustenseWeusethepresentcontinuoustensetoshowthatsomethingishappeningnow.(Thechildrenareplayingin
7、thepark)Wealsousethepresentcontinuoustensetotalkabouttemporarysituations.(WearestayingatPeter’shouseatthemoment.)Weformthepresentcontinuoustenselikethis:SubjectVerbtobeMainverbIam(not)dreamingYou/We/Theyare(not)He/She/Itis(not)WeformYes/Noquestionsandshort
8、answersinthepresentcontinuoustenselikethis:AmIreading?Yes,Iam.No,Iamnot/’mnot.Areyou/we/theyreading?Yes,you/we/theyare.No,you/we/theyarenot/aren’t/’renot.Ishe/she/itreading?Yes,he/she/itis.No,he/she/itisnot/i
