I suddenly came over all shy.

我突然感到非常害羞。

《牛津词典》

I suddenly felt very weepy.

我突然很想哭。

《柯林斯英汉双解大词典》

I suddenly realized what I had to do.

我突然明白我该怎么做了。

《牛津词典》

Then I suddenly asked, "Where is the other twin?"

VOA: special.2009.02.14

And then, suddenly I need to MacBook Air sell my MacBook Air on Craigslist and I can take the person's credit card instead of having them bring $1200 to me or whatever I'm selling it for.

之后突然我需要,在克雷格斯利斯特网站上卖我的,而且我可以让那个人拿信用卡过来,而不是,带着1200美元或是我需要的别的东西给我。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

This waves crashing over me and looking up and see this incredible...suddenly I just felt like I disappeared at that very moment.

海浪向我涌来，抬头便看到,这难以置信的落日，我突然感到,就在那一刻，我消失了。

普林斯顿公开课 - 人性课程节选

Example: A few mornings ago, I suddenly thought of a reggae singer named Desmond Dekker.

FORBES: Apple's iPad Is No Kindle Killer

Surveying the hundreds of memoirs and novels that lined her hallway, I suddenly felt at home.

FORBES: Karin Germany Value in An Exceptional Friend

The conversation was over in a flash, but I suddenly felt quite different about Al Gore.

WSJ: Excerpt: From the Letters of George H.W. Bush