.

Moreover, has been or have been examples?

“Has been” and “have been” are both present perfect tense, which you use when you describe something that started in the past but continues up to the present. Example: She has been working at the same restaurant for five years now. Example: We have been working on the project for five days so far.

Similarly, can we use just only together? Basically, anytime you can use 'only', you can usually use 'just' to mean the same thing. But you've got to remember that the range of uses and meanings for 'just' are quite wide.

Herein, what is the meaning of must have been?

'Must' is an auxiliary verb meaning, in full ' be obliged to', or 'be certain to' (“You must look both ways before you cross the road.”) So 'must have been here' means 'certain to have been here'.

Is been meaning?

The Words "Been" and "Being" Are Participles Let's get technical for a second. Been is a Past Participle. The word "been" is the past participle of the verb "to be." As such, it can be used with "have" (in all its guises) to form tenses in the perfect (or complete) aspect.