我看着它很长一段时间用英文怎么说
时间：
"I've been watching it for a long time" 可以用英语表达为 "I've been looking at it for a long time"。这是一个普通的英语表达方式，没有特殊的来源。
一些例句如下：
"I've been watching the sunset for an hour now" (我已经看日落一个小时了)
"I've been watching the game for two hours, but it's still tied" (我已经看比赛两个小时了，但是仍然是平局)
"I've been watching the progress on the construction site for months" (我已经看建筑工地的进度几个月了)
一些例句如下：
"I've been watching the sunset for an hour now" (我已经看日落一个小时了)
"I've been watching the game for two hours, but it's still tied" (我已经看比赛两个小时了，但是仍然是平局)
"I've been watching the progress on the construction site for months" (我已经看建筑工地的进度几个月了)