I can't remember where to use "has" and where to use "have". If I practice the exceptions and keep them revise few months I can toughly superficially memorize, but I again forgets them.
I'm non-native English-user as well belong autism-spectrum. I feel problems with memorizing discrete, 2-bit informations, for say bus route numbers, friend's birth-dates and institutions. whereas I've no problem with memorizing bigger yet continuous informations like how phloem loading and unloading mechanism works, or of what family a plant could be, or what does integral-calculus actually mean.
Could anyone could provide mnemonics to remember the use of Have and Has with their exceptions?