I'll demonstrate how this machine works. ✬

I'd like Tom to demonstrate how to do the butterfly. ✬

I'll demonstrate. ✬

I'll demonstrate it for you. ✬

Allow me to demonstrate. ✬

Allow me to demonstrate my invention to you. ✬

I'll demonstrate it with the help of some concrete examples. ✬

Can you demonstrate that one more time? ✬

Can you demonstrate that again? ✬

Can you demonstrate that once more? ✬