After he lost his job he began to fall on difficult times.

他把工作丢掉之后，他就开始陷入经济困境了。

youdao

A thin rain began to fall as he turned from the high road into a narrow lane.

当他从大路拐进一条小胡同时，开始下起小雨来。

《新英汉大辞典》

I said his heaven would be only half alive; and he said mine would be drunk: I said I should fall asleep in his; and he said he could not breathe in mine, and began to grow very snappish.

我说他的天堂是半死不活的；他说我的天堂是发酒疯；我说我在他的天堂里一定要睡着的；他说他在我的天堂里就要喘不过气来，于是他开始变得非常暴躁。

youdao

Things began to fall apart when he and his wife Edra decided to divorce.

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He developed 10 rules for himself, and other bariatric patients, and the weight began to fall off.

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Glock insisted he had not handed the title to Hamilton and explained how his decision not to change tyres as the rain began to fall ultimately cost him fifth place.

BBC: Ecstatic Hamilton revels in glory