The pronunciation of g
is determined solely by the following letter (apart from a few recent imports). This is unrelated to g
being the first letter of the word.
G
followed by e
,i
or y
is a “soft G”, i.e. the [ʒ] sound (a voiced palato-alveolar sibilant). This sound is rarely present in English: words like “jerry” have a /dʒ/ sound. The French soft g
, which is also the pronunciation of the letter j
, is the pronunciation of s
in English words like vision or Asia.
G
followed by a
, o
, u
or a consonant, or g
at the end of a word (when it's not silent), is a “hard G”, i.e. the [g] sound (a voiced velar plosive), i.e. the g
in “girl”.
When a hard G sound is needed before e
, i
or y
, French spelling adds a silent u
: the u
modifies the pronunciation of the g
but does not introduce a vowel sound. Example: ligue (a league), pronounced [lig]
(rhyming with “big” in English). Conversely, -ge- can be used before a
, o
or u
to force a soft G; etymology dictates whether the spelling is -ge-
or -j-
.
The same distinction exists for c
, which is a soft C ([s] sound) before e
, i
or y
, and a hard C ([k] sound) everywhere else. (Incidentally, English has the same rule for C.) There are a few words where -cu-
is used to transcribe a [k] sound (e.g. écueil (reef): [ekœj]), but usually -qu-
is used instead. A cedilla on a c
(i.e. ç
) forces the soft sound.