1. I really should...
2. I promise that I'll...
3. I swear I'll / I won't... (a very strong promise)
4. No matter what happens, I'm going to...
5. Come hell or high water, I'll...
#4 and #5 express your determination to do something, even if obstacles appear.

History Facts
The Spanish Inquisition was set up to find people who committed crimes against the church and its teachings. They often questioned and tortured people until they confessed. In the case of a child under 10, though, they could go straight to the torture and not bother with the questions.      .. More >>