Can I trust you to behave sensibly while I'm out?

我能相信你在我出门时会乖乖的吗？

“Can I trust you to keep a secret?” she asks.

“我可以相信你能替我保守秘密吗？”她问？

How can I trust you not to divulge this information to anyone else?

我怎么信任你不会泄露这个讯息给别人？