1.
If you say that something is ~ happening, you mean that it is happening now.
She is ~ developing a number of projects...
The island is ~ uninhabited...
= currently
ADV: ADV before v, ADV group
2.
You use ~ to indicate that something happened quite a short time after the time or event that you have just mentioned. (WRITTEN)
Presently, a young woman in a white coat came in...
ADV: ADV with cl
3.
If you say that something will happen ~, you mean that it will happen quite soon. (FORMAL)
‘Just take it easy,’ David said. ‘You’ll feel better ~.’
= shortly
ADV: ADV after v