Составьте 10 предложений с модальными глаголами в пассивном (страдательном) залоге: must, ought to,has to, have to, should can. например: the work must be completed soon.

The exercise must be done quickly.
The examination ought to be taken by them.
All lessons should be studied by students.
A violin cannot be played by her.
John has been helped by Mary.
It will have been read by Sunday.