Select the correct passive form of the given sentence.

The poor washerwoman washes dirty clothes from morning to evening.

Dirty clothes are washed by the poor washerwoman from morning to evening.

The correct passive form of the given sentence is Dirty clothes are washed by the poor washerwoman from morning to evening.

The other options are incorrect because:

• Dirty clothes were washed by the poor washerwoman from morning to evening uses the past tense, while the original sentence is in the present tense.
• Dirty clothes have been washed by the poor washerwoman from morning to evening uses the present perfect tense, which is not typically used for actions that happen regularly.
• Dirty clothes are being washed by the poor washerwoman from morning to evening uses the present progressive tense, which is not typically used for actions that happen regularly.