1 a is used for ab before a consonant.

Order of Words, Rule 1. — Put the Adjective immediately AFTER its Noun. The English order is just the opposite ; thus where English says ‘a pretty house,’ Latin says ‘a house pretty’ ; where English says ‘the sea-shore’ or ‘the maritime shore’ Latin says ‘the shore maritime.’ This rule applies also to Possessive Adjectives, like ‘my,’ ‘your,’ ‘his,’ ‘our,’ ‘their’: thus where English says ‘my aunt’ Latin siys ‘aunt mine.’ But the rule does not apply to Adjectives used with the verb ‘to be,’ as in ‘the country-house is pretty’ or ‘how pretty the country-house is!’

Order of Words, Rule 2.— Put the Adverb BEFORE the Verb or other word which it qualifies. The English order is often different ; thus where English says ‘sings well’ Latin says ‘well sings.’ English may say ‘sings sometimes’ or ‘sometimes sings,’ but Latin always says ‘sometimes sings.’ This rule applies to the Adverb non, which must always come immediately before the word which it negatives; and it also applies to Adverbial phrases formed with Prepositions, such as ‘far from the sea-shore’, ‘under the shade of the chestnut-tree’ ; thus for ‘the nightingale sings under the shade of the chestnut-tree’ say ‘the nightingale under the shade of the chestnut-tree sings’.

Order of Words, Rule 3. — Put the Accusative before the Verb on which it depends.