Positive and Negative
Practise making the English present continuous (positive and negative forms) here.
Remember, it's really important to know the verb forms inside out, so you can make the tenses without thinking. If you know how to make the tenses really well, you can concentrate only on choosing when to use them, which is more difficult. These exercises will help to make the verb forms automatic.
Click here to review how to make the present continuous.
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Download this exercise in PDF.