七上英语unit2-this-is-my-sisiter-Grammar

指示代词指示代词是用来指示或标示人或事物的代词。本单元我们学习的指示代词有this,that,these和those。仔细观察下面的图片和例子，然后将结论部分补充完整。【观察1】1.Thisisakey.Thatisapen.2.Thesearecups.Thosearerulers.3.ThisismysisterHelen.ThatismybrotherPeter.4.Thesearemyfriends.Thosearemyparents.【结论1】通过观察图片和例子，我们可以发现：1.this和these指代离说话人较________(近/远)的人或物，these是this的复数形式；that和those指代离说话人较________(近/远)的人或物，those是that的复数形式。2.this或that作主语时，be动词用单数形式is，其后表语若为可数名词，用单数形式；these或those作主语时，be动词用复数形式are，其后表语若为可数名词，用复数形式。Key:近;远【观察2】1.—Isthis/thataquilt?—Yes,itis./No,itisn't.2.—Isthis/thatyourbrother?—Yes,heis./No,heisn't.3.—Arethese/thosehiscousins/jackets?—Yes,theyare./No,theyaren't.【结论2】通过观察例子，我们可以发现：1.含有指示代词(作主语)的句型“This/Thatis...”和“These/Thoseare...”变为一般疑问句时，需把is和are提至主语前。2.对“Isthis/thata(n)+表示物的单数名词?”进行简略回答时，常用________代替this或that；对“Isthis/that+表示人的单数名词?”进行简略回答时，常用相应的人称代词he/she代替this或that；对“Arethese/those+表示人或物的复数名词?”进行简略回答时，用________代替these或those。Key:it;they【运用】Ⅰ.根据图片内容，选用方框内的单词完成下面的对话。this,that,these,thoseGrace:Hi,Jane!Jane:Hello,Grace!(1)________boysaremyfriends.(2)________isJack.(3)________isEric.Grace:Nicetomeetyou!JackandEric:Nicetomeetyou,too.Eric:Grace,whatare(4)________inyourhand?Grace:They'repens.Ⅱ.根据括号内的要求完成下列各题。1.Thisisaphone.(改为复数形式)____________________________________________2.ThoseareCDs.(改为单数形式)____________________________________________3.—Isthataruler?(作肯定回答)—__________________________________________4.—Arethoseyourcousins?(作否定回答)—__________________________________________答案Ⅰ.(1)These(2)This(3)That(4)thoseⅡ.1.Thesearephones.2.ThatisaCD.3.Yes,itis.4.No,theyaren't.