The Present Continuous or present progressive tense, commonly it is used to describe actions that are happening at the moment (NOW).
Ex.: Robert is playING with my sister.
Basic use:
-To express action in progress now, temporarily.
Ex.: It's pouring with rain.
-For something already begun before or repeated or habitual action in the present.
Ex.: Anyone who looks at his passenger when He is driving a car is a dangerous driver.
-To show that that the repetition of an action is temporary; it will not go on being repeated forever.
Ex.: We are sleeping out on the terrace during this worm weather.
-To to express intended future action.
Ex.: I’m leaving on the first train tomorrow morning.
Patterns: S + verb to be (AM/IS/ARE) + -ing form of a verb+ Complement.
Some electronic address to review and learn more about The Present Continuous:
http://www.inglestotal.com/present-continuous-progressive-tense-uso-y-estructura-to-be-ing-el-gerundio-lesson-8/http://www.wikilearning.com/curso_gratis/curso_de_ingles-present_continuous_presente_continuo/3405-7