present perfect/simple past/present perfect progressive
TRANSCRIPT
Present Perfect/Simple Past/Present Perfect
Progressive
How do we form Present perfect?
POSITIVE (+): Have/has + V3
NEGATIVE (-): Haven’t/hasn’t + V3
QUESTION (?): Have/has+S+V3
When do we use present perfect?
a. situations that began in the past and continue up to now (for, since)-I have been a teacher since 2008.b. events that have /haven’t happened up to now (ever, never, yet, still, already)-Have you ever been to Syria?c. An event that has occurred more than once in the past (so far)-We have had 3 tests so far.
What is the difference between present perfect and simple past?
PRESENT PERFECT:-past events with no specific mention of time.*I have watched this film before. -situations that started in the past and are continuing. *I have been a teacher
for 3 years.SIMPLE PAST:-past events when time is mentioned*I watched this film in 2000. -situations that began and ended in the past.*I was a student 3 years ago.
How do we form Present Perfect Progressive?
POSITIVE (+): Have/has + been + Ving
NEGATIVE (-): Haven’t/hasn’t + been + Ving
QUESTION (?): Have/has + S + been + Ving
When do we use Present Perfect Progressive?
-For an activity that is happening at the moment-To tell how long this activity has been in progress.
*Right now, I am sitting at my desk.*I have been sitting at my desk since seven o’clock. I have been sitting here for two hours.
What is the difference between Present Perfect and Present
Perfect Progressive?If you say: “I have been writing for 5 hours.”The important thing in the sentence is the time.
If you say: “I have written thirty pages.”The important thing in the sentence is number of pages.
When can’t you use Present Perfect Progressive?
With non-progressives.
You can say:* I have known Alex for 20 years.
You can’t say:*I have been knowing Alex for 20 years.
What are the time expressions ?
since, for, all day/morning