想請問一下唷！ 如果想說騎單車這種活動，應該要說go cycling, go bicycling, go biking 這三種有錯嗎？ 哪一種才是最正確的說法呢？謝謝～

The most commonly used version is to say go cycling.

As a noun, it is bicycle and the short form is bike But as a verb, it is to cycle and to bike. One would not use to bicycle because it only has noun meanings. to cycle to ride a bike So, both go cycling and go biking are correct but bike can be easily confused with motorbike, so go cycling is the clearest for the listener. Note: bike = Informal of a. a bicycle. b. a motorbike. c. a motorcycle.