sudden可以做形容词。

He was seized with asuddenidea to do sth.

他突然勃发做某事的念头。

The telephone started drilling all of asudden.

电话突然嗡嗡响起来。

Suddenpity teared his sight .

一股油然而生的怜悯之情使他眼泪汪汪。

They were alarmed by asuddenair attack .

突然空袭使他们大为惊恐。

We were seized by asuddenimpulse to run .

我们身不由己突然想跑。

suddenly的形容词是sudden。

1、sudden作为形容词adj.，意思是突然的，未预见到的； 急躁的，仓促的； 快的，迅速的； 急剧。

例句：

①A sudden break in the cloud allowed rescuers to spot Michael Benson.

天气的突然放晴帮助救援人员找到了迈克尔·本森。

②Wind caught the sudden puff of dust and blew it inland.

风猛地刮起一阵灰尘，将它吹往内陆。

③The sudden height dizzied her and she clung tightly.

突然上升的高度让她晕头转向，她抓得紧紧的。

2、sudden也可以作为名词n.意思是： 突然发生的事。

例句：

Then, bit by bit, his back uncurls and straightens until all of a sudden there is he, upright, truly a man.

然后，他的背部一点一点地舒展和拉直，直到突然他变成一个真正的直立的男人。

扩展资料

近义词：abrupt

abrupt作为形容词adj.，意思是生硬的；突然的；唐突的；陡峭的。

例句：

①Without a clear structure, your post is likely to come across as abrupt or confusing.

如果没有清晰的结构，你的博文表述可能会显得唐突或者混乱。

②She did not dare to bike down the abrupt slope.

她不敢骑着自行车冲下陡峭的斜坡。