90 + noun
There are 90 students in the class.
班里有90名学生。
九十的
ninety
being ten more than eighty
ninety
n the cardinal number that is the product of ten and nine；s being ten more than eighty
The water boils at 90 degrees Celsius.
水在90摄氏度时沸腾。
用法提示：90作为形容词修饰degrees，表示温度数值。
She scored 90 percent on the exam.
她考试得了90分。
用法提示：90作为形容词修饰percent，表示百分比数值。
My grandmother is 90 years old.
我奶奶90岁了。
用法提示：90作为形容词修饰years，表示年龄数值。
There are 90 students in the class.
班里有90名学生。
用于描述年龄。
My grandmother is 90 years old.
我的祖母90岁了。
用于温度、分数等度量。
The temperature reached 90 degrees Fahrenheit.
温度达到了90华氏度。
grammar · medium
易错句子There is 90 students in the class.
正确表达There are 90 students in the class.
中文中谓语动词不随主语数量变化，英语中主语是复数时谓语要用are。
grammar · medium
易错句子He has 90 book.
正确表达He has 90 books.
中文中数量词后的名词不用加复数标记，英语中可数名词在数量大于1时必须用复数形式。
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