I have often thought about this problem.

我经常思考这个问题。

《柯林斯英汉双解大词典》

"I have often," said Smee, "noticed your strange dread of crocodiles."

“我常常注意到，”斯迈说，“你对鳄鱼有种奇怪的恐惧。”

youdao

You and I have often felt that experience, that disappointment.

你和我也常有这种经历、这种失望。

youdao

And I have often tried to remember how you looked.

VOA: special.2009.12.24

So, my mornings are often rushed because I have two kids.

我早上都很匆忙的，因为我有两个孩子。

耶鲁公开课 - 心理学导论课程节选

I have played the lottery. I don't play very often,

我买过，不过不经常买。

沉迷于彩票的人们 - SpeakingMax英语口语达人

This is a classic case of FINRA playing what I have often called regulatory hide-and-seek.

FORBES: MetLife Broker Barred After Repaying Customer In Full With Interest

And I have often found myself imagining ways of fitting tab A into slot B.

NEWYORKER: Notable Quotables

Over the last 18 years I have often thought about what happened to Jaycee.

BBC: Couple deny California abduction