Has and Had, Did and Does

[Karthikeyan]

What is the difference between "HAS and HAD"
"HAS BEEN and HAD BEEN
what the specific meaning of "been"
WILL
WOULD
COULD
What is the difference between "DID and DOES"

[Mister Micawber]

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What is the difference between "HAS and HAD"-- 'Has' is present; 'had' is past.

"HAS BEEN and HAD BEEN
what the specific meaning of "been" -- It is the past participle of the verb 'BE', and can carry any of its many meanings:

BE –verb (used without object)
1. to exist or live: Shakespeare's “To be or not to be” is the ultimate question.
2. to take place; happen; occur: The wedding was last week.
3. to occupy a place or position: The book is on the table.
4. to continue or remain as before: Let things be.
5. to belong; attend; befall: May good fortune be with you.
6. (used as a copula to connect the subject with its predicate adjective, or predicate nominative, in order to describe, identify, or amplify the subject): Martha is tall. John is president. This is she.
7. (used as a copula to introduce or form interrogative or imperative sentences): Is that right? Be quiet! Don't be facetious.
–auxiliary verb
8. (used with the present participle of another verb to form the progressive tense): I am waiting.
9. (used with the present participle or infinitive of the principal verb to indicate future action): She is visiting there next week. He is to see me today.
10. (used with the past participle of another verb to form the passive voice): The date was fixed. It must be done.
11. (used in archaic or literary constructions with some intransitive verbs to form the perfect tense): He is come. Agamemnon to the wars is gone.

WILL, WOULD, COULD-- If you would like to know their meanings, first try using your DICTIONARY.

What is the difference between "DID and DOES" -- 'Did' is past; 'does' is present.
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Native English teacher at Mister Micawber's

[Karthikeyan]

thanku sir ....and i am sorry i am misspelled sister....

[Mister Micawber]

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Did you mean 'Mister' or were you looking for a female moderator?
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Native English teacher at Mister Micawber's

[Karthikeyan]

but how somebody using "he does" for past activites

[Mister Micawber]

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We don't use does for past; 'does' is present.
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Native English teacher at Mister Micawber's

[Karthikeyan]

and where we will use 'do' any sentence please

[Mister Micawber]

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It is also present tense, for all persons except 3rd person singular (which uses 'does').
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Native English teacher at Mister Micawber's

[Karthikeyan]

now i am clear thank you sir.