sentences in active voice and passive voice

1. ACTIVE : Alexander Grahanbell invented the telephone.

PASSIVE : The telephone was invented by Alexander Grahanbell.

2. ACTIVE : Monchy saw a ghost.

PASSIVE : A ghost was sow by monchy.

3. ACTIVE : Claudia bought a pair of shoes.

PASSIVE : a pair of shoes was bought by claudia.

4. ACTIVE : They sell CDS.

PASSIVE : CDS are sold by them.

5. ACTIVE : I 'm buying a new hause.

PASSIVE : a new hause is being bought by me.

6. ACTIVE : Willian shakespiere wrote Romeo and Julieta.

PASSIVE : Romeo and Julieta was written by Willian shakespiere.