ASMAR english grammar book (Sách ngữ pháp tiếng Anh )

... Matches When (ch) has the sound of (k) adds only (s) Like: Epoch – Epochs By adding (es) at the end of nouns ending in (y) following a consonant (y) is change in to (I) and (es) is added Like:... Pianos Nouns ending in (O) following a vowel takes only (S) Like: Video – Videos Radio – Radios and Etc Nouns ending in (F) or (Fe) change (F) or (Fe) into (V) and add (es) Like: Wife - Wives Knife... pluralizing of noun is adding (s) or (es) at the end of singular nouns Like: Book Books Watch Watches Rules of adding (S) or (es) Nouns ending in o, s, ss, ch, sh, x, z take (es) Like: Box, Boxes – Dish,