I have got it. 和 Got it. 以及 I got it.

这3种表达同样的含义：I have understood it. 或 I understand it. 我明白了。

1. I have got it. 或 I've got it. 是更正规的写法。
2. Got it. 是I've got it. 的缩写形式。^[1]
3. I got it. 是一种发音省略，但是实际上是语法错误。^[2]

参考

1. Thursagen(2011-6-30). "English Language & Usage Stack Exchange - What is "Got it!" short for?". Retrieved 2015-11-14.
2. Drag0nspeaker(2013-11-16). "The Free Dictionary Language Forums - now I get it / now I got it". Retrieved 2015-11-14.