小学英语单数的句子变成复数的句子

 　　把单数的句子成复数的句子：

　　变法是把能变成复数的词变成复数，但a或an要把去掉。特殊疑问

　　词、形容词、国家及地点通常不变。

　　Eg：把下列句子变成复数

　　1， I have a car ----we have cars

　　2， He is an American boy. ----They are American boys

　　3， It is a car ----They are cars

　　4， This is an eraser ----These are erasers

　　5， That is a backpsck -----Those are backpacks

　　6，I‘m an English teather ------We are English teathers

　　7，It’s a new shirt---- They are new shirts

　　8，He‘s a boy ----They are boys

　　9，She’s a singer ------They are singers

　　10，What‘s this in English?---- What are these in English?