Another question about aspiration of voiceless stop consonan

Sonny   Mon Nov 09, 2009 12:08 am GMT
Hi all,

I know that /t/ /p/ and /k/ are aspirated when they begin a word or a syllable. I’m a little confused as to when to aspirate /t/ /p/ and /k/ when they appear in the middle or end of a word like in the following cases:

In American English,

1) Do you aspirate /p/ in “keep it”, “She’s a keeper”, “I’m keeping it”, “stop it”, stopper”, and “stopping”?

2) Do you aspirate /p/ in “pepper”, “support”, "kipper", “paper”, "snappy", and "sleepy"?

3) Do you aspirate /k/ in “stick it”, “sticker”, “sticking”, "kicking", "sticky", "lucky", and "pocket"?

I'm trying to see the general rule applying to the aspiration of /t/ /p/ and /k/ in American English.

Thanks in advance.