Write affirmative and negative sentences in the present continuous. 1)They/listen/to us(×) 2)Laura/do/her homework (+) 3)He/work/on this exercise(×) 4)we/go/to our Art class(+)

1) They aren't listening to us.2) Laura is doing her homework.3) He isn't working on this exercise.4) We are going to our Art class.