1.WesawMrZhangjustnow.
Wedidn'tseeMr.Zhangjustnow.
DidyouseeMr.Zhangjustnow?Yes,wedid.No,wedidn't.
Whomdidyouseejustnow?
2.HeteachesusEnglisheveryday.
Hedoesn'tteachusEnglisheveryday.
DoesheteachyouEnglisheveryday?Yes,hedoes.No,hedoes't.
Whatdoesheteachyoueveryday?
3.Thereisabagonthedesk.
Thereisn'tabagonthedesk.
Isthereabagonthedesk?Yes,thereis.No,thereisn't.
What'sonthedesk?