功能一：当对方谈论的事情不明确,需要询问清楚时,可用这一句型.如：
I'd like a cup of tea.How about you?
功能二：向对方提出建议或请求,相当于句型Would you like...语气很委婉.如：
How about having some bread?＝Would you like some
bread?
功能三：寒暄时用作承接上下文的转折语.如：
I'm a teacher.How about you?
功能四：询问天气或身体等状况.如：
1.How about the weather in your city?
2.How about your father?
功能五：征求对方的看法或意见.如：
How about this car?