pay 指付出的意思 attention指註意力的意思
用法：
1.pay attention註意 專心 留心
eg.Sorry I wasn't paying attention 對不起，我剛才 沒留意
pay attention to +賓語（名詞或-ing)（後面帶賓語的情況）
eg.These people were having a conversation
rather than paying attention to the movie這些 人在聊天而非專心看電影
2.pay no attention=not pay much/any attention沒太在 意
3.pay attention to sth.還有認真做某事的意思
4.(focus) attention on專註於
eg.My attention wasn't on the game我的註意力並沒 有在比賽上
除此之外，還有“look out”“be careful”等