so help me (God)
US /soʊ hɛlp mi (ɡɑd)/
UK /soʊ hɛlp mi (ɡɑd)/

1.
天知道, 我發誓
used to emphasize that one is telling the truth or making a very serious promise or threat
:
•
I swear I didn't do it, so help me God!
我發誓我沒做,天知道!
•
I'll get to the bottom of this, so help me.
我一定會查明真相,天知道。