I can confidently promise that this year is going to be very different.

我可以有信心地保证今年将大不一样。

She walked confidently across the hall.

她自信地走过大厅。

I can confidently say that none of them were or are racist.

我可以确信地说他们当中没有人是种族主义者，过去不是，现在也不是。