When making a statement or declaration, such as "i'm making a kinyan for Ploni", must it be vocalized as a statement, or can it sound like a question (raising the tone at the end a little; hopefully you know what i mean). This is assuming we're not discussing someone who always talks like that.
In other words, must it be recognizable as a statement, or must you merely say the words?
Edit: I'm referring to any kind of statement that changes something's status in Halacha. Some examples: making a kinyan, taking challah, taking trumot and maasrot, etc.