*I was on the beach

  I wasn't on the beach

*he was totally crazy

  he wasn't totally crazy

*she was a good friend

  she wasn't a good friend

*they were awesome  

  they weren't awesome

*we were there

  we weren't there

*it was better

  it wasn't better

*she was beautiful

 she wasn't beautiful

*Were you a student at Cambridge University?

*Weren’t you at home when the fire started?

*Weren’t we there when the bar opened for the last time?

*Were Saul and his cousin the ones who robbed the bank?

*Weren’t they going to go by bus?

*When were you going to tell George the truth?

*Were your friends going to invite Janeth to the prom?

*Was David sad about the break up?

*Wasn’t Ivette in New York when her nephew was born?

*Was Blanca dancing when you got to the party?

*Was it as difficult as Pedro said?

*What was she doing when you first saw her?

*Was she going to accept the offer?

*What was Martin going to say when you interrupted him?