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S: Spelling and Pronunciation 
In order to work out whether the sound is S or Z, you have first to ask:
- Is it an inflection or not?
Remember, by "inflection" we mean any of the following:
loves( 3rd. person singular present of the verb:'She loves Selfoss' )
cats (plural)
John's (possessive)
the girls' (plural possessive)
's = is (Mary's leaving)
's = has (Mary's gone)
If it's an inflection, go to
INFLECTIONAL -S
If not, go to
LEXICAL -S
INFLECTIONAL -S
First, FIND THE SOUND IMMEDIATELY PRECEDING THE INFLECTION.
For example: - loves /



/ - the preceding sound is the lenis fricative
.
- wants /




/ - the preceding sound is the fortis plosive
- sees /


/ - the preceding sound is the vowel
- voices /




/ - here the ending is -
. (This means that some speakers have -
, and others have -
). - The sound immediately preceding the ending is
.
As we can see, there are 3 possible endings:
- -

after SIBILANTS
or s-sounds (voices, watches, dishes, barges, the Jones's, Magnus's, buses)
- -
after FORTIS CONSONANTS (other than sibilants) - i.e. after
,
,
,
(tops, Dick's, rats, laughs, paths)
- -
after EVERYTHING ELSE (all other consonants and all vowels) - (robs, hugs, spades, trees, leaves, bathes, Joe's, Ann's, things, ends, he's, she's, cars, spiders...)
We can show this diagramatically:

You can also find this information in Wells's (




) Longmans Pronunciation Dictionary under "-s, -es", p.666 (p.615 in older editions)
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LEXICAL S
When s is not inflectional, when it is part of the word, and so "lexical", it's not always so easy to work out the pronunciation. - We'll also consider the other sibilant SPELLING FORMS under this section - z, c, ss, ti and so on.
There are a few rules which will help us, but much of the time you'll need to consult a dictionary. Most of these rules seem to work fairly well:
- 's' at the beginning of words is pronounced /s/ (unvoiced) - see, stop, Sue.
- 's' at the end of words, when it is not inflectional, is usually /s/ (unvoiced) - crisis, curious, Magnus, us (but 'as' has /z/). In 'has' and 'does' the -s is inflectional, and voiced -


, 

.
- 'z' is always voiced /z/ - zoo, zink, prize, crazy, buzz, quiz. But 'tz' is /ts/ - waltz /




/, Ritz /


/
- 'c' before 'e', 'i', 'y' is always /s/: price, voice, cellar, cylinder, recite.
- 'ss' is usually /s/ (unvoiced) - kiss, kissing, fusser, lesson, massive -- but not always! For instance, 'dessert' (= sweet course at the end of a meal) is pronounces like the verb 'to desert', both with z and the accent on the second syllable - /





/ (but the noun 'desert' has the accent on the first syllable: /




/.) - Other exceptions are 'possess' /




/, 'scissors' /




/, 'dissolve' /





/ (like resolve' /





/) - but compare 'dissolution'/








/.
- 'ss' is pronounced /
/ (unvoiced) inwords like pressure', /




/.
- 'ssi' and 'ti' are pronounced /
/ (unvoiced) in words like 'mission' /




/, 'nation /




/ - note the 'i' is silent.
- 'si' and 'su' are pronounced /
/ (voiced) in words like 'vision' /




/, 'pleasure' /




/.
But these rules only cover a small number of -s- words. Most of the time, when s occurs in the middle of words, there ae either no rules or they are so complicated that it may simply be better to learn the word. Look it up in a dictionary!
Here is the handout on S-spelling for the 6th week; answers will go up after the 6th week.
See also 'S - Spelling-to-sound' in LPD.
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If you have any questions mail me at peturk@hi.is.