ls this your computer?改为肯定陈述句

ls this your computer?改为肯定陈述句 ls this your backpack? 改为陈述句 Is this your computer?改肯定陈述句. ls this your pen?(改为肯定句） 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 mobile作肯定回答 ls this your ruler改为复数句 Is this your computer?变陈述句 ls this your book ?（作肯定回答） Is that your computer?(改为肯定句)