How would he know she was in trouble?

他是怎么知道她陷入困境的？

youdao

But I mean, how would he know I'd grown?

但我的意思是，他怎么会知道我长大了？

youdao

But how would he know if she were giving him the correct dosage?

但是他怎么能确定她是不是给他正确的药剂量呢？

youdao

He said he would get it, but first he wanted to know how big she thought the moon was.

VOA: special.2009.03.28

Sure, if my son would wake up and I didn't tell him, he wouldn't know that it was duplicate.

当然，如果我儿子醒来,可我还是没告诉他，他不会知道这塔是重新搭的。

耶鲁公开课 - 死亡课程节选

So, it would be interesting to know what he thought about that.

所以,要知道他的想法是挺有趣儿的

耶鲁公开课 - 古希腊历史简介课程节选

Captain PAUL OLSEN (U.S. Army): Would he know anything?

NPR: On Patrol with the Iraqi National Police

If she had a home or a big car payment or a husband, he would be more likely to promote her because he would know that she can't just pick up and leave whenever she wants.

CNN: Not nearly a 'Perfect' picture, but agreeable

He would know it because he once lived it, and he fixed it.

FORBES: Ronald Reagan Would Not Be Fooled By Today's Presumptions of Low Inflation