Question

where we used "has been +v4" is used but in many cases" has been found "and "has been requested "also using WHY AND HOW

Answer 1

Answer:

Have been + V4 Or Has been +V4

Use of have been +V4 Or has been + V4 in present perfect continuous tense.

Examples:

I have been studying since morning.

We have been studying since morning.

You have been studying since morning.

They have been studying since morning.

He has been studying since morning.

She has been studying since morning.

Have been + V3 Or Has been +V3

Use of Have been + V3 Or Has been +V3 in passive voice of present perfect sentences.

Active voice: He has found the lost pen.

Passive Voice: The lost pen has been found by him. (find-found-found)

Active Voice: He has requested the principal.

Passive Voice: The principal has been requested by him.(request-requested-requested)

Hope this helps you.