How to pronounce 屆時 in Cantonese (3 out of 5):

屆時你會孤立無援
You're isolated and helpless.

Cantonese Sentence Breakdown

屆時 gaai3 si4
when the time comes
nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
wui6
a moment (Taiwan pr. for this sense is [huǐ])
metropolitan
gatherings union
to meet
to catch up
孤立無援 gu1 lap6 mou4 jyun4
isolated and without help