1) There is a pen in the box. 2) She comes late. 3) We came late. 4) She has a cat.
1) Is there a pen in the box? 2) Does she come late? 3) Did we come late? 4) Does she have a cat?
1) There is no pen in the box. 2) She doesn't come late. 3) We didn't come late. 4) She doesn't have a cat.