他知道我没有，否则他不会这么说的。

He knows I have none, or he would not talk so.

youdao

哎呀，他确实有话要说，否则他不会这样做的！

By George, he has got something to tell, or he wouldn't act so!

youdao

孩子们在这种事情上可能会粗心大意，但除非这成为常态，否则他不会大惊小怪。

Children can be careless about things like that, and he won't make a big fuss about it unless it becomes a regular thing.

youdao