I used to feel safe but I don't any more.

我曾经感觉很安全，但以后不会了。

youdao

I used to feel this way when I was doing graphic design.

以前我做形象设计的时候一直这么觉得。

youdao

Before my diagnosis, I used to feel that I had pieces missing.

在诊断之前，我确实觉得我缺了几片图片。

youdao

So, if you feel there's not enough math used, I guarantee you that I certainly know enough eventually to snow the whole class, but that's not the point.

如果你觉得我用的数学太少,我可以保证,我知道的数学知识,足以难倒在座的所有人,但这不是重点

耶鲁公开课 - 基础物理课程节选

So it's not to be used when you just feel sort of "Nahhhh, I don't know."

所以，当你仅仅是觉得“嗯……我不清楚”的时候，不能用这个句型。

I hate 课堂 - SpeakingMax英语口语达人

When I was a teenager, my portable music player was a tool that I used to feel completely alone even in very public and social settings.

FORBES: From Walkman to Facebook: How Tuning Out Led to Tuning In

It's a killer, and I'm not as young as I used to be, and you feel it.

NPR: New Orleans Loses a Favorite Lunch Spot

And to the things I used to, 'cause I feel low.

NPR: 'Heartless Bastards' Take Cautious Steps Into Limelight