(+) She slept well last night.
(-) She did not sleep well last night.
(?) Did she sleep well last night?
(+) He visited her yesterday.
(-) He did not visit her yesterday.
(?) Did He visit her yesterday?
(+) You sent a letter last week.
(-) You did not send a letter last week.
(?) Did you send a letter last week?
(+) You sent a letter last week.
(-) You did not send a letter last week.
(?) Did you send a letter last week?
(+) They went to Surabaya yesterday.
(-) They did not go to Surabaya yesterday.
(?) Did they go to Surabaya yesterday?