I was a TEFL/Academic English teacher for 5 years. Grammar is a set of generalisations rather than 'rules', some with looser and with more irregular forms than others. Adjective order is more collocation (sounds natural to native speakers) than consistent generalizations that might be found elsewhere.

I was a TEFL/Academic English teacher for 5 years. Grammar is a set of generalisations rather than rules that matter, some with looser and with more irregular forms than others. Adjective order is more collocation (sounds natural to native speakers) than hard and fast rules than might be found elsewhere.