$1.$ What hobby is yours?

$2.$ We all think painting is interesting because it's creative activity. .

$3.$ He collects toy cars as a hobby.

$4.$ You don't have to finish the work today.

- S + have to + V

$5.$ How long have you started your hobby?

- Have/ Has + S + V3?

$6.$ I spent three hours making this pottery jug.

$7.$ My father enjoys gardening at the weekend.

- enjoy + V-ing

$8.$ What about going swimming this afternoon?

$9.$ There aren't many students take part in the event. 

$10.$ They moved here two years ago.

$11.$ If you don't turn unwanted lights off, you will waste a lot of electricity.

- If + S + V (s/es), S + will + V.