On/After being told that her mother was seriously ill, she hurried back to England.

她得知母亲病重后连忙回到英国。

youdao

My mother stayed awake before my bed when I was seriously ill last night.

昨晚上我病的很厉害，我母亲在我的床前整夜未睡。

youdao

In 1984, Mother was seriously ill. On her deathbed, she said that she was poor and she had not left any legacy behind. She felt indebted to us.

1984年，母亲病得很重。临终前，她说她很穷，没留下任何遗产。她觉得很欠我们的。

youdao

After years of struggling with Parkinson's disease and congestive heart failure, Nancy Williamson's mother became seriously ill last August and slipped into a coma from which doctors said she would never recover.

WSJ: New Efforts to Simplify End-of-Life-Care Wishes

He recommended the Rundown to others, including his mother, who at the time was seriously ill.

NEWYORKER: The Apostate

She then received terrible news: her mother had developed gangrenous bed sores, and was seriously ill.

BBC: NEWS | Health | 'I wish I could have done more'