It depends on the position of the letter in the word:
In word-initial position or after a vowel (in this regard the "soft signь
and "had sign" ъ
function as vowels, which is their historic origin), it's usually pronounced ye
as in yes
, for example. In fact, ye
is the alphabetical name of this letter.
E
can also represent an alternate spelling of ё
(yo
): the dieresis is usually omitted, except in texts for children or foreigners. In such cases, word-initial (or after a vowel) е
is pronounced like yo
in New York.
There's no way to predict this difference other than knowing the actual pronunciation of the word, e.g., елка
is a spelling variant of ёлка
(Christmas tree), thus it's pronounced 'yolkah
.
Note that the letter ё, as well as its alternate spelling е, is always stressed, so елка
in the sense of Christmas tree is pronounced as 'yolkah
with the stress on the first syllable. In some cases, the dieresis is omitted from a ë
in the middle of a word, and you just have to guess the actual pronunciation. For instance, четырехколесный
is a alternate spelling of четырёхколёсный
(four-wheeled), so the first yo
has secondary stress, and the second yo
has primary stress since the second part is the root and thus this 'yo' is necessarily stressed, while the first part is only a prefix (not in the formal grammatical sense, but only an auxiliary modifier of the main root, so only it can only take a secondary stress, while the main root obeys the general rule that yo
is always stressed.)
After a consonant, e
is pronounced differently: it usually modifies the consonant, making it "soft", i.e. palatalized. As far as I know, there are no palatalized consonants in English, so this effect is difficult to explain. Compare man
vs.men
, then место
(place) is pronounced asmiesto
, or, m'esto
with the [m] as in merry
. Note how this is consistent with the name of the letter, ie
, so it virtually adds a "soft sign", similar to i
to the consonant; I'd write the pronunciation ofmerry
in Russian as мери
.
After a palatalized consonant, the sound itself is pronounced with a slight trace of a smile, as in men
as opposed to man
, or as in "base", in which, to my ear, "b" is palatalized, kind of "bieys", which I would write asбейс
. In order to avoid this palatalizing effect, the letter э
is used instead, which is pronounced identically, but does not palatalize the preceding consonant, i.e. it doesn't insert an i
before it.
After a "hard" (non-palatalized) consonant, е
is pronounced identically to э
, as in send
/"pen", (not as in "sand", "pan"), sorry if I get the pronunciation of these words wrong, English is not my language — Russian is.