Where is his baseball?改为复数形式
where is his baseball为复数
where is she (改为复数形式)
where is your dictionary改为复数形式
is that his key (改为复数形式)
This is his cousin.改为复数形式
that is his sister改为复数形式
where’s his black backpack?改为复数形式
That is his baseball.改为复数句 My tennis ball is (under the bed)
Is that your baseball 改为复数句
where is my pencil-box?(改为复数形式)
Where is my pencil-box (改为复数形式)
This is his baseball(改为否定句)