Meaning : The momentary present.
Example :
Now is a good time to do it.
It worked up to right now.
Meaning : In the historical present. At this point in the narration of a series of past events.
Example :
President Kennedy now calls in the National Guard.
Washington now decides to cross the Delaware.
The ship is now listing to port.
Meaning : Used to preface a command or reproof or request.
Example :
Now hear this!.
Now pay attention.
Meaning : At the present moment.
Example :
Goods now on sale.
The now-aging dictator.
They are now abroad.
He is busy at present writing a new novel.
It could happen any time now.
Synonyms : at present
Meaning : Without delay or hesitation. With no time intervening.
Example :
He answered immediately.
Found an answer straightaway.
An official accused of dishonesty should be suspended forthwith.
Come here now!.
Synonyms : at once, directly, forthwith, immediately, instantly, like a shot, right away, straight off, straightaway
Meaning : (prefatory or transitional) indicates a change of subject or activity.
Example :
Now the next problem is....
Meaning : In the immediate past.
Example :
Told me just now.
Now meaning in Telugu.