pay vt.1.支付；2．给予（注意等），进行（访问） vi．存款，付出代价
pay a fine 交罚款（pay some money as punishment for one's violating the regulations）
对话：
A: Why didn't you stop when we first signalled?
A：我们一开始发信号时你为什么不停下来？
B: l'm sorry. Will I have to pay a fine?
B：对不起，我要交罚金吗？
pay a visit 参观，拜访
例句：He stopped (to)pay a visit to George．
他停下来去拜访了乔治。
pay attention (to) 集中注意力于……
例句：If only I paid attention in class．
我要是上课注意听就好了。
pay off 有回报，值得；还清债务；成功，起作用（get reward，worth；pay the whole debt; succeed, work）
例句：1. You'll have to pay off the old Ioan before being allowed a new one.
你得先还清以前的贷款才可再贷新款。
