I-----subject
am looking forward
to showing you-------idiomatic, gerund,
my best yoga exercises---------noun phrase,object
one day-------adj. a phrase of time.
(on how to control my body and mind and breathing.)
我真的很期待有一天能展示我最好的瑜珈動作給你看。
I'm really looking forward to showing you my best yoga in one day.
Adjustment: I'm really looking forward to show you one day with the best technique of yoga I ever had.
參考: Partly according to ”The Advanced Learner's Dictionary of Current English with Chinese Translation” published by Hong Kong Oxford University Press in 1975