Choose the correct option. I (to wash) my car the day before yesterday.

The correct option is 'washed'. The sentence should be: 'I washed my car the day before yesterday.' Explanation: * The phrase 'the day before yesterday' indicates that the action took place in the past. * Therefore, we need to use the Past Simple tense. * The Past Simple form of the verb 'to wash' is 'washed'. So, the correct answer is 'washed'.