You can use some easy verbs like dancing,running etc.As helping verbs you can do the same (simple helping verbs!) and surely i'll not forget to give an example;
example no.1-Rita is dancing on her favourite song.
example no.2-The boys are running in the park.
example no.3-The small baby is crying.
pls mark as best if helpful and remember i've not copied this from any book or website!!!!!!!!