curriculum/challenges/english/blocks/learn-how-to-talk-about-past-activities/672be7dd1d802e3307bbddf7.md
Listen to the audio and complete the sentence below.
Linda, looking back, how long have we been BLANK on these updates?
collaborating
A word that means working together on something. It ends in -ing.
Have been collaborating is a form of the present perfect continuous tense. It describes an action that started in the past and is still ongoing. For example:
We have been collaborating on this project for two years. - This means that the collaboration started two years ago and is still happening.
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