sudden的副词形式是suddenly 突然地；忽然；

sudden：

adj. 突然的，意外的；快速的；

n. 突然发生的事

扩展资料

His death was very sudden.

他死得很突然。

She felt the sudden clutch of fear.

她突然感到一阵恐惧。

It was all very sudden.

一切都非常突然。

I felt a sudden tingle of excitement.

我突然感到了一种强烈的兴奋。

The sudden noise put her off her game.

突然的嘈杂声干扰了她的比赛。