Simple Past
Pattern Subject + tobe (was, were)+.....
Subject + Verb II
Uses
a. Completed Action in the Past.
It’s used when we want to express an action started and finished at specific time in the past.
Example:
They celebrated the party last Saturday night.
This sentence means that the situation started at Saturday night and finished at Saturday night too (in the past)
b. A Series of Completed Actions.
It’s used when we want to express more than one action as a completed action in the past.
Example:
I went to the Beach, swam with my friend, and sun bathed for a while.
It expresses that the series of action happened in one day in the past.
c. Duration in Past
It’s used when we want to express a situation within a duration in the past. The action is started and stopped in the past.
Example:
My Parents stayed in a Hotel for five days.
It expresses that the Parents started and stopped the action during five days in the past.
d. Habits in the Past
It’s used when we want to express habit which was done in the past.
Example:
She usually played “Dakon” when she was a child.
It tells us that the habit happened when she was a child and not to be done when she was teenager or adult.
e. Past Fact or Generalization.
It’s used when we want to express a fact which happened in the past , and the fact only took place in the past.
Example:
Nenesh was Vero’s Boyfriend, but now they break up.
It tells us that Nenesh became vero’s boyfriend but now the fact is “Nenesh is not Vero’s boyfriend”.
Past Perfect
a. Subject + had + been + ......
b. Subject + had + V III + .......
Uses
a. Completed Action Before Something in the Past.
It's used when we want to express the idea that something occured before another action in the past.
Example:
She got 1 millions dollars because she had won the contest.
It tells us that "She had won the contest" occured before "She got 1 millions dollars".
b. Duration before something in the past.
It's used when we want to show that something started in the past and continued up until another action in the past.
Example:
She had had a laptop for two years, before it was stolen.
It tells us the duration before something happened in the past.
c. Specific time with past perfect.
Unlike with the present perfect, it is possible to use specific time words or phrases with the past perfect.
Although this is possible, It's usually not necessary.
Example:
He had visited his parents once in 2011 before he moved in with them in 2013.
Moreover
If the Past Perfect action did occur at a specific time, the simple past can be used instead of the Past Perfect when "before" or "after" is used in the sentence. The word "before" or "after" actually tell us what happens first, so the past perfect is optional.
Examples:
a. He had visited his parents once in 2011 before he moved in with them in 2013.
b. He visited his parents once in 2011 before he moved in with them in 2013.
"Both sentences above are correct"
However
If the past perfect is not reffering to an action at a specific time, past perfect is not optional.
Example:
She never saw a bear before she moved to alaska. (not correct)
She had never seen a bear before she moved to Alaska. (correct)
Here past perfect is reffering to a lack of experience rather that an action at a specific time. For this reason, simple past can not be used.
Present Perfect
Pattern : Subject + Have / Has + V II + ....
Uses
a. Unspecific time before now.
It’s used when we want to express something happened at an unspecific time before now. It’s not allowed to use specific time in this case.
Example:
They have traveled to Bali two times.
It happened before now but it doesn’t mention the specific time.
b. Experience
It’s used to express the experiences but it can not be used to describe a specific event.
Example:
She has been to London.
This sentence means that she has had the experience of being in London. May be she has been there once or several times.
c. Change over time.
• It’s used when we want to talk about change that has happened over a period of time.
Example:
My English has really improved since I studied English in English Department.
This sentence means that I have had a change in improvement of English because I studied in English Department.
d. Accomplishments.
We often use the present perfect to list accomplishments of individuals and humanity. We can not mention a specific time.
Example:
Doctors have cured the diseases.
e. An uncompleted action we are expecting.
We use the present perfect to say that an action which we expected has not happened, we are still waiting for the action to happen.
Example:
John hasn’t graduated from English Department, but he can communicate english well.
f. Multiple action at different times.
We use present perfect to talk several different actions which have occured in the past at different times.
Example:
White has attacked native america many times.
The process of attacking is not complete and more action are possible.
g. Duration from the past until now.
It’s used when we want to use present perfect to show that something started in the past and has continued up until now.
Example:
She has been in England for six months.
The sentence tells us that she still lives in England until now.
NOTICE:
“Last year” and “in the last year” are very different in meaning. “Last year” means the year before now, and it is considered a spesific time which requires simple past. “in the last year” means from 365 days ago until now. It is not considered a specific time, so it requires present perfect.
Example:
a. I have been to mexico in the last year.
b. I have been to mexico at least once at some point between 365 days ago and now.