I water flowers every day.-Present Simple Active
Flowers are watered by me every day.Present Simple Passive
He sent a letter yesterday.Past Simple Active
A letter was sent by him yesterday.Past Simple Passive
We have just bought a new TV set.Present Perfect Active
A new TV set has just been bought by us.Present Perfect Passive
She will read a book tomorrow. Future Simple Active
A book will be read by her tomorrow.Future Simple Passive