PRESENT CONTINUOS

Is a tense that is used to express actions that occur in the present, at the same time thatis stating the phrase. The Present Continuous is formed with the present of the verb (to)be plus verb in gerund action Affirmative: Subject+ am/is/are+verb(ing) ...Negative: Subject+ am/is/are+not+verb(ing)....Interrogative: Am/is/are +Subject+Verb(ing) ......
HERE THERE ARE SOME EXERCISES: http://www.isabelperez.com/happy/tenses/present_cont.htm