I have 的常用口语形式，尤用于 have 用作助动词时

I've been to Paris twice.
我去过巴黎两次。

She's a talented musician, I've heard her play several times.
她是一位有才华的音乐家，我听过她演奏好几次了。

He's never been a very good listener, I've noticed.
他从来就不是一个很好的倾听者，我注意到了这一点。

We've decided to go on vacation next month.
我们决定下个月去度假。

They've just moved into a new house.
他们刚搬进了一个新房子。

I've always loved learning new languages.
我一直喜欢学习新的语言。

She's quite busy these days, I've heard.
这些天她很忙，我听说了。

The company's profits have increased significantly this year, I've read in the news.
这家公司今年的利润显著增加，我在新闻中读到的。

He's a great cook, I've tasted his food before.
他是一个很棒的厨师，我以前尝过他的菜。

We've been planning this trip for months.
我们已经计划这次旅行好几个月了。