She has left us for a few days

She has left us for a few days
 

In English we can't say

*He has died for a long time.

and it must be changed to

-He died a long time ago.

But can we say this?:

-She has left us for a few days.

Absolutely.
We can also say "He has been dead (for) a long time."

Thank you, Rusty.

For

-He has vanished/disappeared for a few days.

1. Is it correct English?
2.If no, must we correct it to

-He vanished/disappeared a few days ago.

Both are correct.

Thank you, Rusty.