No it's not. The present perfect tense would be she has worked.
No, it's the present perfect continuous tense. It follows this structure: Subject + Have/Has + Been + Present Participle.
The present tense of work is work (I work, you work, he works, she works, it works, we work they work). The present continuous - am/is/are working; the present perfect - have/has worked; the present perfect continuous - have/has been working.
It's in the present perfect tense.
The past perfect progressive tense of work is "had been working".
Present tense
The phrase "They are being used" is in the present continuous tense. This form indicates that the action is currently happening.
The present perfect tense is Have/Has Hidden.
The present perfect tense is has/have existed.
Yes, the sentence 'He has been working all day' is in the present perfect continuous tense.
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
Was is a past tense conjugation of be. The present perfect tense of be is have/has been.I/We/You/They have beenHe/She/It has been
The present perfect tense of "are" is "have been."