tenses with today

Here's the broad difference.

A: You're working hard today / all day. Sounds like it is said while B is still working.
B: I have a lot to do

You've worked hard today. Sounds like it is said after B has finished working, eg in the evening.

Hi Clive,

Thanks for replying. I see the difference now.

Original sentence: Jim is on vacation this week. He's staying with his sister in Vermont.

Can you say, He's been staying with his sister in Vermont?

Thanks
TN

Yes.

Hi Clive,

Do you mean 'He's staying with his sister this week and He's been staying with his sister this week' are the same?

Thanks
TN

Do you mean 'He's staying with his sister this week and He's been staying with his sister this week' are the same?
No, I just meant that you can say it, ie it's a valid sentence.That was your question.

He's staying with his sister this week Suggests he is still there.

Hi, Clive, would you tell me the difference between these sentences if there is any, please? I often get stuck when I need to decide which one to use between present continuous, present perfect continuous, and present perfect. How can I avoid making mistakes by using the right tense for a situation, teachers. I hate sounding silly when I fail to use a proper tense.
Anyway,

1.a. He is listening to the music all day.
He's doing it right now, so the day is not finished. It sounds like his intention is to listen until the day ends.

b. He has been listening to the music all day. Stresses he has be doing it for a long time. Sounds

Thank you, Clive, for your kind reply!

Did you mean that the suitability of the 'time - expression' determines which tense is more appropriate for a certain situation?

With the time expressions such as, all [day / night / morning / week / month/ semester / year etc.] or eve