Proofreading

1. articles -->a/an/the/some/any/singular/plural
2.subject-verb agreement-->e.g. I go /He goes
3.tenses-->active / passive
4.conjunction-->and (in addition, besides, furthermore, even, moreover)/but (although, however)/or (else, whereas) /when/since
5.preposition-->in/on/at/through/past/along/by
6.parts of speech-->noun/pronoun/adjective/adverb/verb
7.spelling
8.choice of vocabulary
9.phrasal verb
10. modal verbs-->shall/may/might/can/could/should/would/will
11. sentence structure --> subject +verb + object + adjunct (relative clause - who that)
12. present participle/ past participle ---> an interesting book, I'm interested in something