1. I don't have a car. (WISH)

Solution: The sentence is in the present simple tense. To express a wish about the present, we use the past simple tense after 'wish'.

Explanation:

• The original sentence is: 'I don't have a car.' (Present Simple).
• To express a wish about a present situation, we use 'I wish I + past simple'.
• The past simple of 'have' is 'had'.

Answer: I wish I had a car.