cast a shadow over 给……蒙上了一层阴影（over和on区别不大)

常常可以灵活翻译为：

使…黯然失色；泼冷水；使……前途未卜、给……留下创伤等等

类似用法：

cast a cloud over

cast a pall over

cast a blight on

The sad news cast a shadow over the proceedings.

这个坏消息给事件的进程蒙上了一层阴影。

The allegations cast a cloud over the Mayor's visit.

这些说法给市长的访问蒙上阴影。

The ship's sail cast a shadow on the water.

船帆在水面上投下一片影子。

He didn't want to cast a shadow on their happiness.

他不想给他们的幸福蒙上阴影。

The tragedy cast a shadow over their lives.

这一悲剧在他们的生命中投下了一片阴影。

The sad news cast a shadow over her face.

这个不幸的消息使她脸色阴沉。

The two world wars cast a shadow over the people all over the world.

两次世界大战在全世界人民中投下了阴影。

Her father's illness cast a cloud over her wedding day.

她父亲的病给她的结婚喜庆日蒙上了一层阴影。

His miserable manner cast a cloud over the whole proceedings.

他痛苦的样子给整个活动蒙上了一层阴影。

His very presence cast a cloud over the meeting.

他的到场给这次会议蒙上了一层阴影。

It was the country’s worst suicide attack that cast a cloud over her hopes of return.

这个国家最严重的一次自杀式进攻使她回去的希望蒙上了一层阴影。

News of her death cast a pall over the event.

她的死亡消息给这件事蒙上了阴影。

The unrest has cast a pall over what is usually a day of national rejoicing

动荡的局势给往常举国欢庆的日子蒙上了阴影。

The gossip that Aragaki Yui has fallen in love casts a pall over immeasurable male fans.

荒垣结衣恋爱的传闻给无数男粉丝内心留下了难以愈合的创伤。

That lingering uncertainty cast a pall over stock and bond markets.

这种持续的不确定性给股市和债券市场蒙上阴影。

John’s cancer diagnosis cast a pall over our holidays.

约翰的癌症诊断给我们的假期蒙上了阴影。

We don't want to cast a pall over the festivities.

我们不想给庆典蒙上阴影。

His death cast a blight on the whole of that year.

他的死使那一整年都处在阴影之中。

The threat of war cast a blight on their happiness.

战争的威胁使他们的幸福蒙上了一层阴影。

The accident cast a blight on the family.

那场事故给这一个家庭蒙上了一层阴影。

His absence cast a blight over the family.

他的缺席使家庭笼罩上一层阴影。

We don't want to cast a pall over the festivities.

我们不想给庆典蒙上阴影。

Fears for the President's safety could overshadow his peace-making mission

对总统安全的担忧可能会给他的调解使命蒙上阴影。

As long as it remained unsolved, it cast a shadow over the relations between us.

只要这个问题不解决，在我们两国人民之间的关系就被蒙上了一层阴影。