Choose grammatically correct sentences

Which sentence is correct?

• Could you write when you was five?
• Could you write when you were five?

Which sentence is correct?

• The boy broke his arm during baseball game last night.
• The boy did broke his arm during baseball game last night.

Which sentence is correct?

• I weren't at the office yesterday.
• I wasn't at the office yesterday.

Which sentence is correct?

• I wanted did some cleaning in the evening.
• I wanted to do some cleaning in the evening.

Which sentence is correct?

• I dropped my keys in the street and somebody found them.
• I droped my keys in the street and somebody found them.

Which sentence is correct?

• When I were a primary school student, I got only good marks.
• When I was a primary school student, I got only good marks.