If you want to talk about something that happened in the past and how long it took, you have to use the simple present
But there are a few things you need to know before you can use it.
Examples:
I have been playing american football for two years.
He has been playing american football fot two years.
They have been playing american football for two years.
ever, never, yet, so far, since, for, already, just, today, this week, this year
Examples:
I`m so tired, I haven`t been sleeping all night.
She has been eating her meal for already one hour.
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