我男朋友说我会喜欢徒步假期，但我不太确信。

My boyfriend says I'd enjoy a walking holiday, but I'm not ___convinced.

我确信她在撒谎。

I'm ___convinced that she is lying.

我确信我将来会从这次经历中受益。

I'm ___convinced that I would benefit from this experience in the future.