Use simple past tense to describe something that wholly occurred at a specific time in the past:
I graduated from NYU in 1998.
NOT: I have graduated since 1998. |
|
(That's when the ceremony occurred.)
(Incorrect!) |
I finished the Hollins project last week.
I have finished the Hollins project last week. |
|
(Specific time)
(Incorrect!) |
Use
present perfect tense to describe something that has been in effect from a certain point in the past until now. Be careful! Some verbs are used for specific actions; others are used for conditions that cover lengths of time.
I
met Mr. Flinders last year at a Convention in Little Rock.
I have met him since last year.
I
have known him since last year. |
|
(Specific time)
(Incorrect!)
(Correct!) |
Use
simple present tense to describe facts.
I work for IBS Corporation.
He's a sanitation engineer.
I am responsible for orienting new employees.
She answers company correspondence.
Use
present progressive tense to describe ongoing projects.
I am developing new software.
She is teaching the hearing-impaired.
We are building a new mall in East Heights.
Great
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