1)

Present Simple

They listen to music (affirmative)

They don't listen to music (negative)

Present Continuous

They are listening to music (affirmative)

They aren't listening to music (negative)

2)

Present Simple

We eat dinner at home (affirmative)

We don't eat dinner at home (negative)

Present Continuous

We are eating dinner at home (affirmative)

We aren't eating dinner at home (negative)

3)

Present Simple

She plays tennis in the park (affirmative)

She doesn't play tennis in the park (negative)

Present Continuous

She is playing tennis in the park (affirmative)

She isn't playing tennis in the park (negative)

4)

Present Simple

We study snakes at school (affirmative)

We don't study snakes at school (negative)

Present Continuous

We are studying snakes at school (affirmative)

We aren't studying snakes at school (negative)

5)

Present Simple

You write an email in English (affirmative)

You don't write an email in English (negative)

Present Continuous

You are writing an email in English (affirmative)

You aren't writing an email in English (negative)

6)

Present Simple

They visit some friends (affirmative)

They don't visit some friends (negative)

Present Continuous

They are visiting some friends (affirmative)

They aren't visiting some friends (negative)

7)

Present Simple

He looks at the teacher (affirmative)

He doesn' look at the teacher (negative)

Present Continuous

He is looking at the teacher (affirmative)

He isn't looking at the teacher (negative)