单数句变复数句,复数句变单数句.It is a bus____________________
问题描述：
单数句变复数句,复数句变单数句.It is a bus____________________
答
They are buses.
it--they
is--are
bus-buses
以s. sh. ch. x 结尾的名词，变复数在词尾加es。
答
They are buses.
答
they are buses