|Simple Present Tense
||He works in Oakland.
||He doesn’t work in Hayward.
||Where does he work?
||Why doesn’t he work in Hayward?
|Present Tense with Main Verb To Be
|My office is in EV6.
||My office is not in the Tower Building.
||Where is your office?
||Why isn’t your office in the Tower Building?
|Present Continuous Tense (=Present Progressive Tense)
||We are reviewing verbs.
||We are not playing cards.
||What are you doing?
||Why aren’t you listening to me?
|Simple Past Tense
||We went out to eat last night.
||We didn’t cook dinner last night.
||Where did you eat last night?
||Why didn’t you call me?
|Past Tense with Main Verb To Be
|She was absent yesterday.
||She wasn’t here yesterday.
||Why was she absent?
||Why wasn’t she here?
|Past Continuous Tense (= Past Progressive Tense)
||I was taking a shower when the phone rang.
||I wasn’t working when the phone rang.
||What were you doing when the phone rang?
||Why weren’t you waiting by the phone?
| Future Tense with Will
||I will be at work tomorrow morning.
||I won’t be home tomorrow morning.
||Where will you be tomorrow morning?
||Why won’t he be here?
|Going to Future
||I’m going to take a vacation in September.
||I’m not going to take a vacation this summer.
||When are you going to take a vacation?
||Why aren’t you going to take a vacation this summer?
| Present Continuous Tense as future
||I’m taking a vacation in September.
||I’m not taking a vacation this summer.
||When are you taking a vacation?
||Why aren’t you taking a vacation this summer?
|Future Continuous Tense ( =Future Progressive Tense)
||I’ll be sleeping at four a.m. tomorrow.
||I won’t be studying at four a.m. tomorrow.
||What will you be doing at four a.m. tomorrow?
||Why won’t you be coming tomorrow?
|Present Perfect Tense
||I have known them for four years.
||I haven’t known them for long.(OR I have never met them.)
||Have you ever met them?
||Why haven’t you finished yet?
|Present Perfect Continuous Tense
||I’ve been studying English for seven years.
||I haven’t been paying attention.
||How long have you been studying English?
||Why haven’t you been paying attention?
|Past Perfect Tense
||My parents had known each other for ten years before they got married.
||His parents had not met each other (OR had never met each other) .before they got married.
||How long had your parents known each other before they got married?
||Why hadn’t you parents met before they got married?
|Past Perfect Continuous Tense
||I had been studying English for three years when I came to the U.S.
||He yelled at me because I had not been listening to him.
||How long had you been studying English when you came to the U.S.?
||Did he know that you hadn’t been listening to him?
| Future Perfect Tense
||By noon, I will have been here for six hours.
||By noon, he won’t have been here for long.
||How long will you have been here?
||Why won’t he have been here for long?
|Future Perfect Continuous Tense.
||In June, I will have been teaching here for twelve years.
||My friend won’t have been teaching here nearly as long.
||How long will you have been teaching here in June?
||Why won’t your friend have been teaching here?
|Type 2 Conditional
||If I won the lottery, I would buy a new car.
||If I won the lottery, I wouldn’t quit my job.
||What would you do if you won the lottery?
||Why wouldn’t you quit your job if you won the lottery?
|Type 3 Conditional
||If we had known you wanted to come, we would have invited you.
||If she had known about his drinking problem, she wouldn’t have married him.
||What would she have done if she had known?
||Why wouldn’t he have called me if had had gotten my message?
||I can swim.
||He can’t swim.
||Can you swim?
||Can’t he swim?
||He might have forgotten the meeting.
||He might not have known about the meeting.
||Might he have forgotten the meeting?
||Mightn’t he have just decided not to come?
||I used to walk to school when I was in elementary school.
||My parents didn’t use to drive me to school.
||Did your parents use to drive you to school?
||Didn’t your parents use to worry about you?
||I have to work this afternoon.
||She doesn’t have to work this afternoon.
||Do you have to work this afternoon?
||Who doesn’t have to work this afternoon?
||I had to work last Saturday.
||She didn’t have to work last Saturday.
||Did you have to work last Saturday?
||Who didn’t have to work last Saturday?