第1个回答 2013-02-20
现在进行时He is learning how to ride the bicycle.一般现在He learns how to ride the bicycle一般过去He learned how to ride the bicycle
第2个回答 2013-02-20
learn how to ride a bicycle~
才对哦
第3个回答 2013-02-20
learn to ride a bike
第4个回答 2013-02-20
learning to ride a bicycle