Did you understand? Were you tired?

 

Practice was or were

The verb to be is one of the most common irregular verbs.  

It has it's own pattern for simple past -- NO DID!

Don't use "did" or "do" as question words if the main verb is any form of to be.

Where were you today?

Were you okay in class today?

Was the grammar difficult?

Were you at home?  Why? Was a child sick?  Were you sick?

Are you traveling this weekend?