In this page you will find exercises with the present continuous tense in the different forms: affirmative, negative and questions:
http://www.eclecticenglish.com/grammar/PresentContinuous1F.html
In this page you will find exercises with the present continuous tense in the different forms: affirmative, negative and questions:
http://www.eclecticenglish.com/grammar/PresentContinuous1F.html
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