Avvalo birinchi grammatik qoidalarni undan so’ng qiladigan xatolarni ko’rib chiqing bu sizni kelasida qilinadigan har qanday xatolardan saqlab qoladi. Uni tugatib test yechish sirlarini yaxshilab o’rganib chiqing

Bu otlar ko’pligi umuman boshqacha yasaladi
child children, ox oxen, foot feet, penny pence, goose geese, person people, louse lice, tooth teeth, man men, woman women, mouse mice
Ba’zi oxiri s bn tugagan otlarning ko’pligi ham o’zgarishsiz qoladi Barracks-barracks, series-series, crossroads-crossroads, species-species…
! E’tibor bering; ba’zi sanalmaydgan otlarni oxiri s bn tugaydi ularning ko’pligi yo’q news, billiards, draughts(sport o’yinlarini ko’pi s bn tugaydi birlik) yoki ba’zi kasallik nomlari ham(measles) Here is the news, ( n o t Here are the news.)
Ko’pgina oxiri -ics (e.g. mathematics, physics, athletics) bilan tugagan otlar asosan sanalmaydigan ot va ularning ko’pligi yo’q
Too much mathematics is usually taught in schools, (n o t T oo many mathematics are . . .)
Ba’zi oxiri ics bilan tugagan otlar ko’plikda ham ishlatilishi mumkin
Politics is a complicated business, ( b u t What are your politics?)
Bazi otlar ko’pligi o’zgarmay qoladi: aircraft, hovercraft, spacecraft, Chinese, Japanese(va boshqa millatni bildiruvchi so’zlar ese bn tugagan) sheep, deer, fish,va boshqa yashaydigan jonzodlar: asosan oziq ovqat uchun ovlanadi. Fish so’zi kamdan kam holda fishes holida ishlatiladi va bu holda u baliqlarning turini nazarda tutayotgan bo’ladi…
Chet el kelgan so’zlarning ko’pligi

Singular	Plural	Singular	Plural
analysis	analyses (Latin)	appendix	appendices (Latin)