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14. Taylor sang a song in the contest.
(-) Taylor didn't sing a song in the contest?
(?) Did Taylor sing a song in the contest?
15. My parents went to the shopping mall yesterday.
16. Did you phone your mom this morning?
(+) I phoned my mom this morning
(-) I didn't phone my mom this morning.
17. That dress didn't cost me much money.
(+) That dress cost me much money.
(?) Did that dress cost you much money?
18. We were in Paris 5 years ago.
(-) We weren't in Paris 5 years ago.
(?) Were we in Paris 5 years ago?