They are America boys.

They are America boys. They are American boys.(改为单数句) This is an America There are America boys改错句 they are such naughty boys There boys are from English,and those ( ) are from America. The boys over there are from America.(对America提问） Where are They are from America的一般疑问句 they are from America .but now they are in Shanghai ----what are they from?----They are from America.改错 they are chinese boys改成单数 （how/what）clever boys they are Are they boys here?（否定回答)