Passive voice can be used in ALL tenses. The structure is always: BE (in the tense you need) + past participle. Change the form of BE to match the tense.
Quick tip: Passive = BE (in correct tense) + past participle. Change BE to match the tense: is/was/will be/has been/had been + past participle!
Present Tenses Passive
Simple Present: am/is/are + past participle. Present Continuous: am/is/are being + past participle. Present Perfect: has/have been + past participle.
The car is washed every week. (Simple Present Passive)
The car is being washed now. (Present Continuous Passive)
The car has been washed. (Present Perfect Passive)
Past Tenses Passive
Simple Past: was/were + past participle. Past Continuous: was/were being + past participle. Past Perfect: had been + past participle.
The car was washed yesterday. (Simple Past Passive)
The car was being washed when I arrived. (Past Continuous Passive)
The car had been washed before I saw it. (Past Perfect Passive)
Future Tenses Passive
Future Simple: will be + past participle. Future Perfect: will have been + past participle.
The car will be washed tomorrow. (Future Simple Passive)
The car will have been washed by 5 PM. (Future Perfect Passive)
Common mistakes
Not "The car will wash tomorrow." — say "The car will be washed tomorrow.". Future Passive needs: will be + past participle (not will wash)..
Not "The car is wash." — say "The car is washed.". Passive needs past participle (washed), not base verb (wash)..
Practise it
What tense? Change BE to match! Present = is/are. Past = was/were. Future = will be. Perfect = has/have been or had been. Then add past participle!