Verified answer

Bonsoir

Le present perfect BE + V-ing (ou present perfect continuous) se forme ainsi =>

have (au présent = have/has) + been + Base Verbale -ing

Il parle d'une action commencée dans le passé et qui a toujours un impact sur le présent ou qui vient se terminer.

le fait d'utiliser la forme "continuous" permet d'insister sur le déroulement de l'action.

for = durée générale (for weeks, for two months ...)

since = le point de départ  (since yesterday, sinve 1988, since the 2nd of October ...)

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a-You have been watching movies for hours !

b- The phone has been ringing since this morning!

c- Where have you been ? I have been worrying since yesterday.

d- Carrie has been babysitting these two children since they were one and two years old.

e- The director is desperate! He has been looking for a solution for two months.

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bonne soirée ☺☺☺