I think he started to go mad.

我想他开始发疯了。

youdao

German Banks that were not able to go mad on mortgages at home bought up American subprime loans instead.

德国银行在国内无法疯狂地开展抵押贷款业务，转而大笔购买美国的次级房贷。

youdao

The flight was to be fully automatic, but what if weightlessness caused Gagarin to go mad and override the programmed controls?

飞行过程是完全自动化的，但是如果失重令加加林情绪失控随之打乱预定程序控制该怎么办？

youdao

When he sees the carvings on the tree, he knows he has lost Angelica and he begins to go mad.

NPR: Love And Lunacy: Vivaldi's 'Orlando Furioso'

"You don't go to bed mad, " says the couple's daughter, Madeline Corso, recalling her father's advice.

WSJ: Long-married couples share their secrets to love

He chose the theater to survive, so he wouldn't go mad.

WSJ: Lambert Wilson, Reloaded