Positive and Negative present simple using was/were

1. I was at Sealine on Friday. I wasn't at Sealine on Friday.


2. They were in the college last week. They weren't in the college last week.


3. He was in a lab on Monday. He wasn't in a lab on Monday.


4. The celebration For the independence day For Qatar was in 18th Dec 2009. The celebration For the independence day For Qatar wasn't in 18th Nov 2009.


5. The weather was very nice on Thursday. The weather wasn't nice on Monday.