26. Only; the strict rule is that only should be placed before the word it affects.
27. When not only precedes but also see that each is followed by the same part of speech.
28. At least, always, and other adverbial adjuncts sometimes produce ambiguity.
29. Nouns should be placed near the nouns that they define.
30. Pronouns should follow the nouns to which they refer without the intervention of any other noun.
31. Clauses that are grammatically connected should be kept as close together as possible. Avoid parentheses.
32. In conditional sentences the antecedent or "if-clauses" must be kept distinct from the consequent clauses.
33. Dependent clauses preceded by that should be kept distinct from those that are independent.
34. Where there are several infinitives those that are dependent on the same word must be kept distinct from those that are not.
35. In a sentence with if, when, though, etc. put the "if-clause" first.