PRESENT CONTINUOUS

-Use the Present Continuous with normal verbs to express the idea that something is happening now. It can also be used to show that something is not happening now.

Examples:
You are watching TV.
Are you watching TV?
You are not watching TV.

Present Progressive - Use

1-actions happening at the moment of speaking
Peter is reading a book now.

2- fixed plan in the near future
She is going to Basel on Saturday.

3- temporary actions
His father is working in Rome this month.

4- actions happening around the moment of speaking (longer actions)
My friend is preparing for his exams.

5- trends
More and more people are using their computers to listen to music.

6- repeated actions which are irritating to the speaker (with always, constantly, forever)
Andrew is always coming late.

-Common present continuous time expressions include: at the moment, now, day, this week, this month, tomorrow, next week (for future arrangements ), currently .


Credits:
http://www.englishpage.com/verbpage/presentcontinuous.html
http://esl.about.com/od/grammarstructures/a/prescont.htm
http://www.englisch-hilfen.de/grammar/pres_pro.htm