1. I am sure of his honesty.
我确信他的诚实。

2. Are you sure of the time?
你确定时间了吗？

3. She is not sure of her decision.
她对自己的决定不确定。

A: Are you sure of the meeting time?
A：你确定会议时间吗？

B: Yes, I am sure of it.
B：是的，我很确定。

1) 确信某事

2) 对...有把握

1. 确信；肯定

e.g.
He is sure of his victory.
他确信自己会获胜。

phrase

1. to be certain about something

Synonym: be certain of