Jawaban:

(+) Ari chased my cat in the backyard.

(-) Ari did not chase my cat in the baskyard.

(?) Did Ari chase my cat in the backyard?

(+) They cleaned each room in the house

(-) They did not clean each room in the house

(?) Did they clean each room in the house?

(+) My dad washed the car an hour ago

(-) My dad did not wash the car an hour ago

(?) Did my dad wash the car an hour ago?

(+) she bounght me a new backpack as my birthday present

(-) she did not buy me a new backpack as my birthday present

(?) Did she buy me a new backpack as my birthday present?