Составить предложения со словом write в пассивном залоге во всех временах

Pr.Simple: Letters are written every week.

Pr.Cont.: Letters are being written at the moment.

Pr. Perfect: Letters have already been written.

Past Simp.: Letters were written yesterday.

Past Cont.: Letters were being written at 3 o`clock yesterday.

Past Perf.: Letters had been written by 3 o`clock yesterday.

Fut. Simp: Letters will be written tomorrow.

Fut.Perf.: Letters will have been written by 3 o`clock tomorrow.