I have the notion that /t/ and /th/ (aspirated [t]) are complementary allophones. How would I write the rule that an aspirated t occurs at the beginning of a word and the beginning of a stressed syllable? I already have some of it:
/t/ -> [th] /#_ or ??
-> [t] Elsewhere
But I don't know how to write the syllable bit as a rule.
We've only really spoken about things being at the start or end of gaps and whether the sounds are followed by vowels (front or back) or consonants.
It's a pretty simple question but I can't find the answer anywhere - please bare in mind I've only been studying Linguistics in any capacity for 9 weeks.