Countable nouns:plural form. For most nouns, just add 's' to the end of the noun. Nouns that end in a consonant + 'y' drop the 'y' and add 'ies' to the end of the noun. For nouns that end in sh, ch, s, x, or z, add 'es' to the end of the word. Nouns ending in the consonant combination 'lf' drop the 'lf' and end in 'ves’.
Many nouns that end in 'o' proceeded by a consonant require an 'e' before 's' to be placed at the end of the word. tomato -> tomatoes,hero -> heroes,zero -> zeroes,potato -> potatoes,echo -> echoes. Other nouns that end in 'o' proceeded by a consonant DO NOT require an 'e' before 's' to be placed at the end of the word. Nouns ending in 'o' proceeded by a vowel do not change.kilo -> kilos,radio -> radios,logo -> logos,piano -> pianos,solo -> solos,cargo -> cargos. So we should memorise them.
How many?How many is used when we want to know the QUANTITY of something. It is only used with plural countable nouns. How many apples did you buy?How many plates are there on the table?How many carrots do you want?How many tomatoes did you use for the salad?How many chairs are there in this canteen?How many pieces of chocolate would you like?
Containers Containers are a group of quantifiers. They are used to “measure” uncountable nouns (mainly food, drinks). For example: a bowl of salad, a cup of coffee, a glass of milk, a box of baking soda, a bottle of vinegar, a tube of toothpaste, a carton of juice, a jar of jam, a can of cola etc.