1、They can't roller-skate.
2、They roller-skate down the street.
3、I never learned how to roller-skate.
4、I have never learned how to roller-skate.
5、She roller-skated across rather unsteadily.
6、She traded her roller-skates for Billy's portable radio.
7、Narrator: Sandy and Sue have new roller-skates.
8、Just the thought of strapping on your roller-skates brings a smile to your face.