Passive voice can be used in any clause that has a direct object.

In passive voice, the direct object becomes the passive subject,
and the verb tense goes on BE.

This week, we will use passive voice in one clause of a sentence with multiple clauses and use passive voice in questions.

**Remember: when the dependent clause is first, you use a comma. When it is second, there is no comma.

Again, with the dependent clause second:

Main Clause	Time Clause
My son ate the cookies	before I could serve them to my guests.	Both active
My son ate the cookies	before they could be served to guests.	Time clause passive
The cookies were eaten	before I could serve them to the guests.	Main clause passive
The cookies were eaten	before they could be served.	Both passive

*The time clause (dependent clause) is second, so there is no comma.

The same works with FANBOYS clauses (always second, always comma)

Basic Word Order: Subject - Verb - Object - Prepositional phrase

Question Word Order: WH - Auxiliary - Subject - Main Verb

In passive voice, the auxiliary verb is a form of BE.

ONLY ONE AUXILIARY WORD CAN GO IN FRONT OF THE SUBJECT IN A QUESTION