ls this your backpack? 改为陈述句
ls this your backpack? 改为陈述句
ls this your computer?改为肯定陈述句
ls that your ruler?改为陈述句
ls your last name Smith?改为陈述句
ls that your ruler?(改为陈述句)
ls this your ruler改为复数句
Is this your pencil?改为陈述句+复数
Is this your watch?(改为陈述句)
is this your watch改为陈述句
把Is this your watch 改为陈述句
Is this your coat?(改为陈述句)
is this your coat?改为陈述句