我注意到一辆警车尾随着我们。用英语怎么说？

我注意到一辆警车尾随着我们。

I noticed a police car shadowing us.

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。

police

n. 警察部门，警方，警察，治安；vt. （警察、军队等）巡查，维护治安，（委员会等）监督，管制；adj. 警察的，有关警察的；

例句
A police investigation yesterday absolved the police of all blame in the incident.
警方昨天的调查廓清了其在此事件中的任何责任。

car

n. 汽车，车厢，轿车；

例句
His car was held up and he was abducted by four gunmen...
他的车遭遇拦劫，随后他被4名持枪歹徒劫持。

shadowing

遮蔽，荫蔽；

例句
There he stood: hair in wild tangles, dark stubble shadowing his chin.
他站在那儿，头发乱成一团，下巴上一片黑胡茬。

us

pron. 我们；

例句
Shakespeare has accustomed us to a mixture of humor and tragedy in the same play.
莎士比亚让我们习见了同一场戏目中的悲喜交错。