Simple Modals:
* Can the dishes be washed? (Can + be + past participle)
* Should the report be submitted today? (Should + be + past participle)
* Will the meeting be held tomorrow? (Will + be + past participle)
* May I be excused from class? (May + be + past participle)
Perfect Modals:
* Could the work have been completed earlier? (Could + have been + past participle)
* Should the project have been started last week? (Should + have been + past participle)
* Would the problem have been avoided if we had followed the instructions? (Would + have been + past participle)
* Might the letter have been delivered already? (Might + have been + past participle)
Negative Modals:
* Can't the problem be solved? (Can't + be + past participle)
* Shouldn't the deadline be extended? (Shouldn't + be + past participle)
* Won't the decision be made soon? (Won't + be + past participle)
* May the report not be submitted without approval? (May + not + be + past participle)
Other Examples:
* Must the form be filled out completely?
* Ought the proposal to be revised?
* Dare the message be sent without further confirmation?
* Is the door supposed to be locked at this time?
Things to Remember:
* The passive voice is formed with "be" + past participle of the verb.
* Modals precede the "be" form.
* You can use negative modals to express a lack of possibility or obligation.
Let me know if you'd like to explore more specific examples or variations!