Earlier quoted context omitted.
This is because English has lost most of its Indo-European heritage (except lexical), and looks much more similar to Chinese that to an IE language like German, Spanish, Russian, Greek, Hindi / Urdu, or even Farsi (though Farsi has also lost grammatical gender). * English has no inflections; nouns and adjectives stay the same no matter what role in a sentence do they have. * English has no noun-adjective agreement, a…
English has had a lot of good or at least interesting evolutionary reasons to drop most grammatical cases and grammatical genders. English decided to make some interesting trade-offs in expected word order to lower redundancy in inter-word agreement morphology. Also, while Proto-Indo-European had plenty of grammatical cases, the current theories are that it had fewer grammatical genders than modern languages. The PIE…
Certainly there are languages more closely related to English, like Dutch or Swedish / Norwegian, that stand sort of midway between English and (High) German. But if we take older languages, like classic Latin, or those with many archaic features, like Lithuanian, the distance from English syntax and grammar becomes pretty large.
I suspect that languages tend to simplify in grammar in areas where several different languages have to coexist: say, England had Germanic, Celtic, and French languages interacting for quite some time, with some Latin thrown in by the church.
I suspect that Mandarin Chinese also resulted from many languages on a pretty large territory interacting a lot, shaving grammatical complexity bit by bit.