1) AFFIRMATIVE (+): I watched TV last night.
1) NEGATIVE (–): I didn't watch TV last night.
1) INTERROGATIVE (?): Did I watch TV last night?
2) AFFIRMATIVE (+): My friend bought a new car last month.
2) NEGATIVE (–): My friend didn't buy a new car last night.
2) INTERROGATIVE (?): Did my friend buy a new car last month?
1) AFFIRMATIVE (+): I watched TV last night.
1) NEGATIVE (–): I didn't watch TV last night.
1) INTERROGATIVE (?): Did I watch TV last night?
2) AFFIRMATIVE (+): My friend bought a new car last month.
2) NEGATIVE (–): My friend didn't buy a new car last night.
2) INTERROGATIVE (?): Did my friend buy a new car last month?