1. it's 'i couldn't care less.' 'i could care less' means you do care 11

2. an apostrophe is never used to form a plural 10

3. double negatives 10

4. supposably used instead of supposedly 9

5. 'literally' means it actually happened, not that it was shocking 8

6. 'loose' and 'lose' are two different words 7

7. using 'seen' by itself as the past tense of see 7

8. 'your' doesn't mean you are-that's 'you're' 6

9. there, their, they're - get it straight 5

10. 'nonplus' does not mean what you think it means 4

11. 'affect' is a verb. 'effect' is a noun. 3

12. 'it's' is short for 'it is' 2