Welcome to AW and the Chinese thread.
A lot of us here are learners of Mandarin, but some of us are fluent/native Cantonese speakers.
Thank you for the detailed information re grammar! Love learning something new about Chinese. ^_^
They tend to downplay the role of the passive voice, if a passive construction exists at all, since the main idea of passivization is to turn an object into a subject in languages where the subject is understood to be the topic by default.
They usually do not have expletives or "dummy subjects" (pleonastic pronouns) like English it in It's raining.
They often have sentences with so-called "double subjects", actually a topic plus a subject.
They do not have articles, which are another way of indicating old vs. new information.