如何使用 "troth" 造句

1. This troth seems to be self-evident .
这个真理似乎是不言而喻的。
2. You should never give any troth !
你永远不要给什么誓言!
3. Why didn 't you tell me the troth ?
你为什么没跟我说实话?
4. Why didn 't you tell me the troth .
你为什么没跟我说实话?
5. You should obey your troth .
你应该遵守你的诺言。