■ The Simple Present
- Affirmative statements can use do or does, but only for emphasis.
You're wrong. I do like her.
■ The Present Continuous
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To combine present continuous sentences with and, use the subject and am/is/are only once.
You're sitting at your desk and going through paperwork.
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Is not / are not can be used instead of the contracted form for emphasis in negative short answer.
No, he is not. No, they are not.
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Stative verbs (verbs that do not express actions) are not usually used with the present continuous. The simple present is used instead.
I own a house. *I'm owning a house. (INCORRECT)
