单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,duck,This,is a duck.,This is a duck.,This is a duck.,+,=,These,are ducks.,These,are ducks.,That,is a duck.,That is a duck.,That is a duck.,+,=,Those,are ducks.,Those,are ducks.,What is this?This is a/an,ruler,pencil,eraser,frog,pen,shoe,This,is,a pencil.,These,are,pencil,s,.,That,is,a ruler.,Those,are,ruler,s,.,This,is,a frog.,These,are,frog,s,.,That,is,a shoe.,Those,are,shoe,s,.,This,is,a pen.,These,are,pen,s,.,That,is,an,eraser.,Those,are,eraser,s,.,This/That is a cat.,This/That is a book.,These/Those are flowers.,These/Those are apples.,Grammar,this,指,较近,的,一个,人或事物。,these,是,this,的复数形式，指较近的,若干,人或事物。,如：,This is a student.,These,are,student,s,.,that,指,较远,的,一个,人或事物。,those,是,that,的复数形式，指较远的,若干,人或事物。,如：,That is a bird.,Those,are,bird,s,.,this that,sheheit,isam,pengiraffe,these those,they,are,pensgiraffes,What is it?it is a/an,ruler,pencil,eraser,pen,hamburger,popsicle,giraffe,It,is,a pencil.,They,are,pencil,s,.,It,is,a ruler.,They,are,ruler,s,.,It,is,a pen.,They,are,pen,s,.,It,is,an,eraser.,They,are,eraser,s,.,It,is,a hamburger.,They,are,hamburger,s,.,It,is,a giraffe.,They,are,giraffe,s,.,He,is,a policeman.,They,are,policem,e,n.,She,is,a nurse.,They,are,nurse,s,.,sheheit,isam,pengiraffe,they,are,pensgiraffes,