1. Form the possessive singular of nouns with ’s
3. Enclose parenthetic expressions between commas
4. Place a comma before and or but introducing an independent clause
5. Do not join independent clauses by a comma
6. Do not break sentences in two
7. A participial phrase at the beginning of a sentence must refer to the grammatical subject
8. Divide words at line-ends, in accordance with their formation and pronunciation
9. Make the paragraph the unit of composition: one paragraph to each topic
10. As a rule, begin each paragraph with a topic sentence; end it in conformity with the beginning
12. Put statements in positive form
14. Avoid a succession of loose sentences
15. Express co-ordinate ideas in similar form
16. Keep related words together
17. In summaries, keep to one tense
18. Place the emphatic words of a sentence at the end