『GENKI 2』Lesson 14 (5)┃ も 'as many as" and しか "as few as", or "only"

We can add も to the number word when we want to say "as many as." Ex: 私の母は猫を三匹も飼っています。"My mother owns as many as 3 cats." We can add しか to the number word and turn the predicate into the negative when we want to say "as few as" or "only." Ex: 私が日本語の本を一冊しか持っていません。"I have only one Japanese book."