I am studying in Korean.
In my grammar book, below sentences are called 'participle phrase'
1) Seeing police officer, he ran away.
2) Buying it online, you have to use a paypal.
3) Realizing his mistake, he apologized immediately.
But when I type 'Participle clause', I really surprised.
Because I totally don't know the detail meaning among 'Participle phrase', 'Participle clause', 'Participle construction'.
What are differences among 'Participle phrase', 'Participle clause', 'Participle construction'?