There are examples in English here Greek 701: Greek Sentence Structure (scroll down to where it says Loose Style and Periodic Style: Examples in English)
I want to know what is loose and periodic sentence.....
As a footnote:
Somewhere I read this definition (roughly): A periodic sentence keeps the meaning in suspense, and is not grammatically complete until the close; whereas a loose sentence runs on after grammatical completeness has been reached.
1. I dislike long sentences intensely, especially when full of barely relevant clauses tacked on like afterthoughts, sudden interpolations, and unexpected changes of register. (Loose)
2. Long sentences, full of barely relevant clauses tacked on like afterthoughts, sudden interpolations, and unexpected changes of register, I intensely dislike. (Periodic)
#1 could reasonably end after "sentences", "clauses", "afterthoughts", or "register". But #2 is only grammatically complete after "dislike".
(The periodic style is supposed to be less tiring, on the grounds that it is more likely to retain the reader's attention.)