1. is a sentence fragment.
2. has two errors, a shift in number and a pronoun with no appropriate antecedent.
3. includes an inappropriate combination of modifier and noun. (this one is weird - I first thought the dog was rounding around the corner of the house, like running around the corner, but it's the shrub)
4. includes run-on independent clauses.
5. includes a shift in tense
6. includes an inappropriate use of a semicolon.
7. has a pronoun in the wrong case (I instead of me)
8. has two errors, a verb in the wrong form and an inappropriate use of a semicolon. (tricky one with forms of "lay" and "lie")
9.includes a passive construction
10. includes a pronoun with no appropriate antecedent.