his borthers is a brothers
his borthers is a worker（改为一般疑问句）
these are your brothers(改为否定句）
she is my aunt （改为一般疑问句）
his keys are on the sofa (改为一般疑问句并作简短肯定.否定回答）
her backpack are (on the bed)(括号提问）
the baseballs are under sofa (同上）