This,that,he,she ,it,I,is,am,you,friend,bus,egg,ruler,pen,book,map,apple,cake,teacher,复数形式是什

This-these,
that-those,
he,she,it,--they
I-we,
is,am,-are
you-you,
friend-friends,
bus-buses,
egg-eggs,
ruler-rulers,
pen-pens,
book-books,
map-maps,
apple-apples,
cake-cakes,
teacher-teacher,

these, those, they, they, they, we, are, are, you, friends, buses, eggs, rulers, pens, books, maps, apples, cakes, teachers

This thesethat thosehe theyshe theyit theyI weis aream areyou youfriend friendsbus busesegg eggsruler rulerspen pensbook books map mapsapple apples cake cakesteacher teachers