Choose grammatically correct sentences

Which sentence is correct?

• Could you read when you was three?
• Could you read when you were three?

Which sentence is correct?

• The football player broke his leg during the match last night.
• The football player did broke his leg during the match last night.

Which sentence is correct?

• I weren't at school yesterday.
• I wasn't at school yesterday.

Which sentence is correct?

• I wanted did some excercises in the morning before breakfast.
• I wanted to do some excercises in the morning before breakfast.

Which sentence is correct?

• I dropped a heavy book on my foot.
• I droped a heavy book on my foot.

Which sentence is correct?

• When I were a kid, I never argued with my parents.
• When I was a kid, I never argued with my parents.