"I want to buy a bicycle" 是表达购买自行车的常用说法。
来源：
英语是由古代日耳曼语言演变而来的。这句话的结构基于英语的主谓结构，即"I"是主语，"want"是谓语，"to buy a bicycle"是宾语。
一些例句及翻译：
I want to buy a new bicycle. (我想买一辆新自行车)
Can you help me find a good place to buy a bicycle? (你能帮我找一个买自行车的好地方吗？)
I've been thinking about buying a bicycle for a while now. (我已经考虑买自行车有一段时间了)