Below are three groups of phrases, each has its own rhythmic patterns.
Although those patterns are different, the first and the third group do have some similarities, an additional beat is felt with the the last syllable. Let's take a closer look at them.
For the following phrases (Group 1):
try again /
not enough /
show me yours /
do it now /
make the tea /
The stress pattern of the phrases above is -Da duh Da.
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And use the stress pattern of -duh Da duh for phrases of (Group 2):
I think so /
of course not /
arresting /
are resting / ( the 'are' is read as a schwa sound here, as it usually is in casual conversation)
she's ready /
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And, for the following word or phrases, the stress pattern is -duh DA (Group 3):
offense /
today /
a day /
a fence /
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Those patterns are straightforward, however, the first and the third group do share this similarity in reading: that is, an additional sound or (half) a beat is dded, when they are in the end of a sentense or a thought group in an utterance, especially when they are read emphatically.
With that saying, the phrases in (Group 1) and in (Group 3) are read, thus, as -Da duh Da uh / and -duh Da uh, respectively:
try again /
show me yours /
do it now /
make the tea /
offense /
today /
a day /
a fence /
more examples:
forgot /
to stop /
I can't believe that you forgot.
We thought we told him to stop.
In conclusion, when a word ends up with a stressed syllable, an additional (half) beat is read out. Using Ann Cook's term, having an additional stair case, as if another 'uh' sound is added.