Перетворити в Passive
Solar power will produce 50% of the country’s electricity

50%of country's electricity will be produced by Solar power.

2 my parents     are\are not                              from pragua/

3 we    are\are not         in school now.

4 my bags      are\are not                yellow.

5 my friends and i              are\are not          from england.

6 it                is\isn't        very cold today.

7 i      am\am not                  hungry.     

8 our teacher                    is\isn't        very tall.   

1) he usually visits his grandmother  every saturday  (not is)

2)  what time does she  work ?  

3) how often  do you  use your car ?