Study the example situation:
john is in his house, he is on his way to go to school. he is going to school.
this means: he is going now, at that time of speaking. the action still in progress.
- continuous: S + be (am, is, and are) + verb-ing
- sometimes, the action is happening in the middle of process: S+ be+ not+ verb-ing
- interrogative: be + S + verb-ing
examples I:
- I am reading a book
- she/he/it is diving in a sea
- they/we/you are cooking rice
example II:
- It is not raining anymore, lets we go out now
- we are not having lunch today
- I am not watching TV
example III:
- am I watching TV?
- are we having lunch today?
- is it raining?
Using continuous tense is not necessary happening at the time of speaking.
for example: Nico wants to study in Roma, so he is learning Italian. (perhaps, he is not learning Italian exactly at the time of speaking)
The use of continuous are:
- when we talk about things happening in a period around now ( today, this night, this morning)
- when we talk about changes happening around now. e.g: is your English getting better?