Is she your mather?改为陈述句怎么改

Is she your mather?改为陈述句怎么改 把Is that your math book 改为陈述句怎么改 Is she your sister?改为复数怎么改? 改为陈述句怎么改.  改为陈述句,怎么改?  Is this your computer?改肯定陈述句. Is your sister reading magazine in her bedroom?(改陈述句)怎么改? 陈述句改为转述句怎么改 改为陈述句,怎么改,帮我,急 How old is your mather Is this your pencil?改为陈述句+复数 Is this your watch?(改为陈述句）