Here are the sentences with the verbs in the correct form:
- He often goes to the cinema. (Present Simple - habitual action)
- They are watching TV at the moment. (Present Continuous - action happening now)
- She writes letters to her mother every week. (Present Simple - regular action)
- Nina usually drives to work. (Present Simple - habitual action)
- Father is sitting on the sofa now. (Present Continuous - action happening now)
- Listen. The telephone is ringing. (Present Continuous - action happening now)
- Tim studies a new language every year. (Present Simple - habitual action)
- We always spend the summer in York. (Present Simple - general truth/habitual action)
- In summer we usually go to the seaside. (Present Simple - habitual action)
- Look at Tom. He is riding a horse. (Present Continuous - action happening now)
- He often watches birds in autumn. (Present Simple - habitual action)
- Don't ask me now. I am writing an exercise. (Present Continuous - action happening now)
- She usually watches television in the evening. (Present Simple - habitual action)
- I play the piano every day. (Present Simple - habitual action)