Okay. Here's the rule of thumb with Skyward Sword.
This is a new sort of control scheme. As gamers, we don't have to deal with this very often. So remember to be patient and take the time to learn how it works. In particular, move slowly and be measured in how you react. The AI is smart and will not hesitate to parry or block in real time so you need to be alert and composed. Once everything clicks, it's great! But it could take a bit to learn.