Sign on University Avenue, Berkeley, 2014.

There seem to be more and more instances of the adjective “everyday” being used where the adjective+noun (acting together as an adverbial phrase) “every day” should be used.  Everyday means: “Daily, quotidian, commonplace: happening every day.” Every day also means “daily,” but modifies a verb, not a noun.

Every Day vs. Everyday
The bus driver frowns at me every day. (adj. every modifies n. day; “every day” modifies v. frowns.)
It is an everyday occurrence. (adj. everyday modifies n. occurrence.)
Trick: If you can replace it in a sentence with “every night,” it’s two words. (“Everynight” isn’t a word.)

Similarly (as seen in the badly proofed sign pictured), “everyone” and “every one” are used differently. Everyone is a pronoun, meaning “every person.” Every one is an noun phrase, meaning “each,” often followed followed by a prepositional phrase describing “one”:

Every One vs. Everyone
Every one of his passengers dislikes him. (Both every and the prepositional phrase of his passengers act as adjectives describing one.) NB: This sentence is tricky in regard to subject/verb agreement: the root subject is one [singular], so the root predicate, dislikes, is correspondingly singular. Cf. the sentence:
All of his passengers dislike him.  All is plural, and therefore we use the plural verb dislike. One dislikes; all dislike.
Everyone dislikes him. (Everyone is a pronoun and the subject of the sentence, yet as above, uses one (singular) to determine the verb case.)
He is disliked by everyone. (Everyone is still a pronoun, but the object of the preposition by. The prepositional phrase by everyone acts as an adverb describing v. disliked.)

“Prepositional” is really hard to type correctly.

Happy Passive Voice Day!

Don’t go nuts trying to always avoid passive. Here is a useful illustration of other verb forms being confused for passive in student paper-grading, and links to Language Log posts on the passive voice.

Bonus links: Language Log on the now-archaic passival tense, replaced since ca. the mid-18th century by the progressive passive. Lexicon Valley podcast on passival.

Progressive: She put out the fire.
Passive: The fire was put out (by her).
Passival: The fire was putting out (by her).
Progressive+passive: The fire was being put out (by her).
Pennsylvania Dutch past perfect: She has outened the fire.

Not everyone follows the styles shown below for frequently used Latin words, abbreviations, and initialisms, but these are my usual choices. Chicago 16 instructs us to set common Latin in roman type, with sic being a notable exception. I will, however, sometimes depart from those rules for whole Latin words, depending on author, intended reader, and manuscript intentions.

ab init. ab initio (“from the beginning”).
ad hoc (“to this”). Not abbreviations. “Made for the purpose.” Sometimes italicized.
ad inf. ad infinitum (“to infinity”). As above & below, ad is not an abbreviation.
ad lib ad libitum (“at will”). Commonly without a period; rarely italicized.
c. or ca. circa (“approximately”). Chicago prefers ca.
cet. par. ceterus paribus (“all other things equal”).
cf. confere (“compare”).
e.g. exempli gratia (‘for example”). Follow with a comma.
etc. et cetera (“and so forth”). Better spelled out. Precede with comma.
et al. et alia (“and others”). Et is not an abbreviation, so is not followed by a period.
i.a. inter alia (“among other things”).
ibid. ibidem (“the same place”).
id. idem (“the same person”).
i.e. id est (“that is”). Precedes clarifications, not examples. Usually followed with a comma, but not all style guides agree.
fl. flourit (“flourished”). Used to reference the years of a person’s prime.
f.v. folio verso (“on the back of the page”).
n.b. or NB nota bene (“note well”). Follow with a colon. Often uppercase; frequently with stops. No good reason for either.
passim (“throughout”). Not an abbreviation.
percent per centum (“for each 100”). Word in American English, so not italicized.  Symbol (%) rarely used in prose text.
per se (“by itself”). Not abbreviations.
PS postscriptum (“after what has been written”). Also: PPS post postscriptum.
re in re (“in the matter of”). Not an abbreviation (no period). Usually followed by a colon.
QED quod erat demonstratum (“which was to be demonstrated”). Often treated (and punctuated) as an independent clause.
R. rex or regina (“king” or queen”). Follows monarch’s name. No following period when part of a royal cypher.
RIP requiescat in pace (“rest in peace”). I prefer to spell this out, or omit/rephrase.
sic (“thus” or “so”). Not an abbreviation. Always italicize for clarity.
s.v. sub verbo (“under the word”). As used for citing a dictionary heading.
v.i. verbum intransitivum (“intransitive verb”).
viz. videlicet (“namely”). Precedes an appositive list. No following comma.
vs. or v. versus (“against”). Use v. in specifically legal contexts.
v.t. verbum transitivum (“transitive verb”).

Obviously there are many more, but I haven’t included any Latin that I’ve never actually used or edited. Ipsa scientia potestas est!