1,Isthisyoursister?No,itisn’t.
Issheyoursister?No,sheisn’t.
2,earemyfriends.
earemybrothers.
3,ismyfamilyphoto.
photoofyourfamily=yourfamilyphoto
可數名詞單數變複數:一般情況下加s,book-books,以s,x,sh,ch結尾的'加es
watch-watches以子音字母加y結尾的,把y改為i再加esboy-boys,family-families以o結尾的有生命的加es,無生命的加s,tomato-tomatoes,photo-photos