Present Progressive (-ing form of the verb)

Present progressve

The present progressive or present continuous form combines present tense with progressive aspect. It thus refers to an action or event conceived of as having limited duration, taking place at the present time. It consists of a form of the simple present of be together with the present participle of the main verb and the ending -ing.

We are cooking dinner now.

This often contrasts with the simple present, which expresses repeated or habitual action (We cook dinner every day). However, sometimes the present continuous is used with always, generally to express annoyance about a habitual action:

You are always making a mess in the study.

Certain verbs do not use the progressive aspect, so the present simple is used instead in those cases 

The present progressive can be used to refer to a planned future event:

We are tidying the attic tomorrow.

It also appears with future reference in many condition and time clauses and other dependent clauses 

If he's sleeping when you arrive, wake him up.

I will finish the job while the children are playing.

It can also refer to something taking place not necessarily at the time of speaking, but at the time currently under consideration, 

The king and queen are conversing when Hamlet enters.

For the possibility of a present subjunctive progressive,