pay attention to doing为什么to在这里是介词而不是连词?

pay attention to同义词 pay attention to.翻译 pay attention to pay attention to+? Please pay attention to show attention to=pay attention to pay attention to是什么意思?pay attention to的中文是什么？ pay more attention to 和pay much attention to区别, 英语 翻译 pay attention(to) pay attention to 的用法 pay attention to的用法 pay attention to的意思 pay attention to 怎么用? pay attention to什么意思? really pay close attention to pay attention to的中文 pay attention to的词性 pay attention to do sth 还是pay attention doing sth