Unit 3 Trees and us Section 2 Grammar 课件 -沪教版七年级下册.pptxVIP

Unit3Treesandus;understandwhattreesdoforus.

identifyamazingfactsabouttrees.

describewhatwecandotohelpprotectstrees.

explaintherelationshipbetweentreesandhumans.;Tom,whatareyoudoingnow?;Whataretheydoingnow?;Whatisthemandoingnow?;Whatarethechildrendoingnow?;Iamreadingabook.

Theyareplayingbasketball.

Heissingingasong.

TheyarewatchingTV.;LiNa:HiWangJie.Whatareyoudoingnow?Areyouathome?

WangJie:No,myparentsareaway,soI’mstayingwithmygrandmotherthisweek.I’mwatchingaTVprogrammeabouttrees.

LiNa:Really?SuSuandIareworkingonourgroupproject.It’sabouttrees.Couldyouhelpus?

WangJie:Sure,noproblem!Wecanmeetuptomorrowafterschool.

;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。;What’sthestructureofthepresentcontinuoustense?;Iamreadingabookinthelibrary.

?肯定句:主语+am/is/are+V-ing+其它.

Iamnotreadingabookinthelibrary.

?否定句：直接在am/is/are后加not.;—Areyoureadingabookinthelibrary?

—Yes,Iam./No,I’mnot.

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。

肯定回答:Yes,主语+be(be是要变化的，即am/is/are).

否定回答:No,主语+be+not.

Whatareyoudoingnow?

特殊疑问句：

格式为：What+am/is/are+主语+doing?;时间状语;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.

2.Thestudentsarecleaningtheclassroom.(改为一般疑问句并作肯定和否定回答)

Arethestudentscleaningtheclassroom?

Yes,theyare./No,theyaren’t.;3.I’mplayingfootballintheplayground.(改为否定句)

I’mnotplayingfootballintheplayground.

4.Tomisreadingbooksinhisroom.(改为一般疑问句)

IsTomreadingbooksinhisroom?;主要动词;;Wedonotusuallyusetheverbsintheboxbelowinthepresentcontinuoustense.Instead,weusetheminthesimplepresenttense.;areeating;iseating;Look!Theyaretakingcareofthetree.Theyarewateringit.;一、根据句意，用括号中所给单词的适当形

式填空。

1.Theboy_________(draw)apicturenow.

2.Listen!Someb