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Unit Goals   Grammar Notes     Warm-up

Unit Goals In this unit you will learn about:
  1. Past tense and irregular verbs
    "I went to the soccer game yesterday."

  2. Present perfect tense
    "I've eaten that kind of cereal several times"

  3. Past habits
    "I used to play the piano well, but now I can't."

  4. Past Probability, Possibility
    "I could have left the exam earlier but I decided not to."
    "I could speak French when I was in High School, but now I can't."




Grammar Notes
  1. To ask or tell about things that happened at a specific time in the past, use the simple past tense: go-went, take-took, be-was,were

  2. to ask whether an event has happened anytime before, use the present perfect tense: have + verb-ed e.g. She has helped me a lot.

  3. When you want to show a past habit or a situation that was true in the past but doesn't exist anymore use the expression used to e.g. I used to be fat. (Not anymore)

  4. to show that you had the ability or opportunity to do something in the past but you didn't do it, you use the modals (must, might, could) + have + the past participle of any verb e.g. I could have written her a letter, but I didn't.


Warm-up Click the answer button to see the answer.

  1. I_________that course several times.
    a. take
    b. took
    c. have taken

  2. Mary_______ San Francisco last week.
    a. went to
    b. has gone to

  3. Everybody left the room 30 minutes after the due time. it ___________hard.
    a. could be
    b. can be
    c. must have been

  4. Lena_________ swim when she was ten. Now she can.
    a. couldn't
    b. could

  5. Have you ______eaten?
    a. already.
    b. yet.


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