Present Continuos.

We use present continuous when we talk about an action we are doing in the present. To express the idea that something is happening now, at this very moment.

It can be use in 3 forms:

In a positive sentence : Subject + to be + verb + ing + complement.

In a negative sentence: Subject + to be + not + verb + ing + complement.

In a question sentence: To be + subject + verb + ing +complement + ?


To see some examples go to the next link.

http://www.englishpage.com/verbpage/presentcontinuous.html