1) Children should obey their parents => Their parents should be obey by children

2) I am preparing some cupcakes for my mom's brithday today => Some cupcakes are being prepared for my mom's birthday

3) Where did you buy these pairs of shoes ? => Where were these pairs of shoes bought ?

4)Helen has found a briefcase with no documents recently => A briefcase with no documents have been found by Helen recently

5)Do people speak French in Canada ? => Do French spoken in Canada ?