Cách sử dụng
Ninety is a number in English that comes after eighty-nine and before ninety-one. It is used to count things, such as money or objects, and can also be used to express time, such as in the phrase "ninety minutes." When speaking about age, we often say "ninety years old" to indicate someone's age. It's important to know how to use numbers like ninety when communicating about quantities or time.