1. drive sb. crazy/insane/mad/nuts 把人逼瘋
Literally: force sb. into a state of insanity or mental instability
e.g. The months alone on a deserted island started driving me insane.
Figuratively: annoy or irritate sb.
e.g. This itchy little bug bite is driving me crazy!
2. go bananas 發狂,發瘋
go mildly crazy
e.g. When his pad went missing, I thought he was going to go bananas.

3. go berserk 變得狂怒
go completely crazy
e.g. One day she just went berserk and strangled her cat.
4. stark raving mad 徹底瘋了
totally insane; completely crazy; out of control (often an exaggeration)
e.g. When she heard what happened at the office, she went stark raving mad.
5. crazy/mad/nuts about sb./sth.; crazy for sb./sth. 對某人或某物極度狂熱
very fond of sb. or sth.
e.g. Ann is crazy about John. And he’s crazy about her, too.
6. in one’s right mind 神志清醒
sane; rational and sensible (often used in the negative)
e.g. That was a stupid thing to do. You’re not in your right mind.