1. The Perfect Tenses, Part 1

2. The Present Perfect When do we use it? I have flown on a plane.
When we are talking or writing about something that happened at an indefinite time (not specific) before now. When it happened is not important.
Example:
I have flown on a plane.

3. What does it look like? Two parts
Present tense “have” agrees with the subject:
I have flown on a plane.
She has flown on a plane.
Plus past participle:
Past Participle review here!

4. What does it look like? Negative: Y/N: Short answer: Wh-:
I have not/haven’t flown on a plane.
Y/N:
Has she flown on a plane?
Short answer:
Yes, she has. No, she hasn’t.
Wh-:
When have you flown on a plane/planes?

5. Present Perfect vs. Simple Past
Pres Perf
Past
Maybe/Maybe not finished – let the context and the signals help you
If it’s finished, we don’t know when it happened – we only know “before now”
Signals often for (how long)/since (when started)
Always finished in past
Time signals tell us when it happened
Uses past tense signals (ago, in 1992, last night, etc.)
Might use “for” but won’t use “since”

6. Examples: Finished or not? I lived in London in 1996.
I lived in London for two years.
I have lived in London.
I have lived in London for two years.
I have lived in London since 1996.
I have been to London many times.

7. The Present Perfect Progressive
When do we use it?
When we are talking or writing about something that started some time before now and is in progress (is continuing). We often use this tense to emphasize duration.
Example:
I have been flying on this plane since 8:00.
I have been studying English for three years.

8. What does it look like? Three parts!
Present tense “have” agrees with the subject:
I have been flying on this plane since 8:00.
She has been flying on this plane for 3 hours.
Plus past participle of “be”
She has been flying on this plane for 3 hours.
Plus present participle (“-ing”)

9. What does it look like? Negative: Y/N: Short answer: Wh-:
I have not been listening to the teacher, and now I am confused.
Y/N:
Has she been listening to her teacher??
Short answer:
Yes, she has. No, she hasn’t.
Wh-:
What have you been doing since you got here?

10. Pres Perf vs. Pres Perf Prog
Maybe/Maybe not finished – let the context and the signals help you
If it’s finished, we don’t know when it happened – we only know “before now”
Signals often for/since
Not finished
Started in past but still continuing (and may go into the future)
Can be used with for/since

11. Some tricky things:
A few verbs can be used in pres perf and pres perf prog with the same meaning. Examples: live, work, study.
I’ve been living in Seattle for 2 years = I have lived in Seattle for 2 years.
I’ve been working at NSC for 2 years = I’ve worked at NSC for 2 years.
I’ve studied English since 2005 = I’ve been studying English since 2005.
And
Don’t forget about nonprogressive/stative verbs !
NO: I’ve been liking this class since the first day.

12. Finished? Continuing? She ate breakfast two hours ago.
She has eaten breakfast.
She has been eating breakfast for two hours.
She hasn’t eaten since 10:00.

13. Recap: Present Perfect: Present Perfect Progressive:
Have + past participle
Happened sometime before now but we don’t know when (not specific)
Signals for & since
Present Perfect Progressive:
Have + been + present participle
Started sometime before now, continuing now