记忆卡片

Number words perform distinct communicative functions in English sentences. Cardinal numbers such as one, two, or forty specify an exact count of items. Ordinal numbers such as first, second, or twentieth identify an item's exact position within an ordered sequence. Indefinite words such as many, several, and some indicate approximate quantities without naming a precise figure. Distributive words such as each, every, either, and neither describe how members of a group are considered individually or in pairs. Traditional grammar terms all these words adjectives of number, while modern linguistics often describes them as numerals, determiners, or quantifiers.

Four volunteers unpacked forty novels on the second long table.