Get more lessons at: 2 These are phrases that are difficult to say quickly and clearly because of their repetitive and similar-sounding words One of the most interesting aspects of tongue twisters is that it allows us to practice pronunciation and, above all, agility when it comes to producing sounds in the language. I'm a sheet slitter. And with a mini-story, you will improve your fluency. I'm the sleekest sheet slitter that ever slit sheets. A bloke's bike back brake block broke. I slit sheets