Passive Voice with Modal Verbs

The children can read books.

Susan has to learn geography.

The dog should bring the bones.

Poor people can not spend a lot of money.

Tom must open the window.

The pupils must answer a lot of questions.

How can we solve that problem?

You must not touch this button while the experiment is in progress.

We should call the police at once after the accident.

We must put an end to this quarrel.