I think you would be very busy, you can't talk to me. I know no one can do many things at the same time. You should do what you think is most important, then.
I think you would be so busy you could not talk to me. I know no one can do many things at the same time. You should do what you think is most important anyway.
I think you must be very busy, you can't talk to me. I know no one can do many things at the same time. You should do what you think is the most important.