word sounds

[celtaflorida]

Hi.
would someone please explain why we don't use proper consonant sounds for some words, ie; chevy /ʃevi/ (it's not shevy) instead of /tʃevi/, or chicago instead of shicago etc. Are there any phonetic rules, does it depend on the before and after phonemes?
Also /p/ what are the phonetic rules fro silent /p/ as in psychology.
Thanks a million.

[Raymott]

Hi.
would someone please explain why we don't use proper consonant sounds for some words, ie; chevy /ʃevi/ (it's not shevy) instead of /tʃevi/, or chicago instead of shicago etc. Are there any phonetic rules, does it depend on the before and after phonemes?
Also /p/ what are the phonetic rules fro silent /p/ as in psychology.
Thanks a million.

Words with a French origin starting with 'ch' are pronounced 'sh' - champagne, chalet ...
Words of Greek origin starting with 'ps' are pronounced 's'. - psyche, pseudo, psi ...
What do you mean by "proper consonant sounds"?

[BobK]

If your name means you are studying for a CELTA, you'll soon learn that expressions like 'proper consonants' are more or less meaningless.

b

[celtaflorida]

Thanks for the tip!

[celtaflorida]

Appreciate the answer.
Proper consonant sound was a mistake.
Thanks.