Has anyone mended that chair yet?

⇒ Has that chair been mended yet ?

I told him to write to the adress

⇒ I told him that the address to be written.

Somebody has locked the box and I cannot open it

⇒ The box has been looked and I can't open it.

Is Mr.Jones going to give a lecture next week?

⇒ Is a lecture going to be given by Mr.Jones next week.

When I visited their house, they had clean everything.

⇒ When I visited their house, everything had been cleaned.

Has anyone mended that chair yet? 

=> Has that chair been mended yet ?

I told him to write to the adress

=> I told him the address is written to me.

Somebody has locked the box and I cannot open it

The box has been locked and I can't open it.

Is Mr.Jones going to give a lecture next week?

=> Is a lecture going to be given by Mr Jones next week?

When I visited their house, they had clean everything.

=> When I visited their house had been cleaned every thing.