Present continuous (or progessive) is used for:
a) Actions that are happening at this moment:
I am reading this sentence right now.
b) Actions that are happening during the present period of time
I am studying 4th of ESO this year.
c) Arranged actions in the future:
I'm visiting my grandmother this evening.
EXTRA: It can also be used for habitual actions in a negative sense:
d) My little brother is always crying.... I can't stand it!
The affirmative structure uses the subject + verb TO BE as auxiliary + the main verb ending in -ING
I am writing
You are working
He/She/It is playing
We are learning
They are reading
We always negate the auxiliary:
I'm not reading
you aren't listening
he/she/it isn't working
we aren't playing
they aren't writing
The question structure is as follows (like wagons in a train):
(WH-) + Aux. BE + Subject + V-ing...?
Am I teaching?
Are you studying?
Is he/she/it swimming?
Are we playing?
Are they getting ready?
Remember the spelling rules for the -ing form!
Typical time expressions used with this tense are NOW, AT THE MOMENT, AT PRESENT...
I WANT MORE: