|Present perfect and past simple|
from Algeria asks:
Could you please explain to me the exact difference between the uses of the present perfect and past simple tenses, especially when asking questions?
We use the present perfect when we are considering something that started in the past and which we want to connect with the present.
may be something that started in the recent past, or it may have
started a long time ago. Look at the following examples:
In the affirmative, we often use the prepositions for or since with a time phrase and the adverbs just and already.
the negative we often combine the present perfect with the adverbs
never and yet. Look at the way they are used in the
following and the preceding examples.
Present perfect: interrogative
When we want to ask questions using the present perfect, we often use the adverbs ever and yet or use the How long...? construction.
the interrogative, we must also remember to invert subject and verb.
Study the following: li> 'Has the doctor called yet to see mother?' 'Yes, he's just been.'
li> 'Has the doctor called yet to see mother?' 'Yes, he's just been.'
Past simple: affirmative and negative
We use the past simple when we want to refer to actions which were completed in the past. It is used with a wide variety of past time phrases or expressions in reply to the question When??, such as; earlier this morning, yesterday, last week, from April until June last year, in 1999, during the war, between 1985 and 1988, before we got married.
negative is formed with the auxiliary verb didn't. Study
the following examples:
Past simple: interrogative
In the interrogative, we must always remember to use the auxiliary verb did with normal inversion. It is always associated with the When...? question and may be used with a wide variety of other question forms too. Study the following examples:
It is early evening in Henry's home in the country.
Now see if you can write a dialogue combining the past simple and present perfect.