我注意到他的手在发抖。用英语怎么说？

我注意到他的手在发抖。

I noticed his hand shaking.

noticed

v. 注意（ notice的过去式和过去分词 ），觉察；

例句
Meg was so abstracted she scarcely noticed that the train had stopped...
梅格想得出了神，几乎没有注意到火车已经停了。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

hand

n. 手，协助，帮助，（工具等的）把，柄，掌管；vt. 传递，交给，搀扶，支持；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

shaking

n. 摇动，挥动，震动，震惊；adj. 抖动的，发抖的，颤抖的；v. 摇撼( shake的现在分词 )，（使）颤抖，握手，动摇；

例句
I didn't think about the danger at the time. Afterwards I was shaking like a leaf.
我那时候没想到有危险，事后我吓得直发抖。