sad的副詞形式怎麼寫

Sadly, both he and my mother died of cancer

非常不幸的是，他和我母親都死於癌症。

He'll be sadly missed. He was a real character.

人們會非常懷念他的`，他可真是個有趣的人啊。

Sadly, the film is let down by an excessively simple plot.

遺憾的是，過於簡單的情節使得這部電影差強人意。

Sadly, most of the house was destroyed by fire in 1828.

遺憾的是，這座房屋在1828年的火災中大部分被燒燬。

Sadly, the project has now been shelved.

不幸的是，計劃現在已經擱淺。