Tongue twister

1. i thought a thought. but the thought i thought wasnt the thought i thought i thought. if the thought i thought had been the thought i thought i thought, i wouldnt thought so much
2. peter piper picked a pack of pickled pepper. a pack of pickled pepper peter piper picked. if peter piper picked a pack of pickled pepper, where's the pack of pickled pepper peter piper picked?
3. betty botter bought a bit of butter. the butter betty botter bought was bitter. so betty botter bought a bit of better butter, to make the bitter butter better.
4. how much wood would a woodchuck chuck if a woodchuck could chuck wood?
5. she sells seashells on the seashore
6. sharon wears sue'z shoes to zoos to watch cheap sheeps
7. they threw three thousand free thistels thursday
8. he run from the indies to the andes in his undies
9. sixty six thick things and sixty six thin things
10. the sixty sixth Sheik's sheep is surely sick
11. the witch switched the switch that the ipswitch had switched
12. cross crossings cautiosly
13. is there a pleasant peasant present?
14. sister susie's sewing sixty three shirts for sixty three sick seamen
15. three switched witches is watching three swatch watch switch. which witch is watching which swatch watch switch?