1 (wiktionary) 2 (zh.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Verbs Nouns Adjectives/Adverbs Pronouns Prepositions Conjunctions
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My class is made up of forty students .	我的班由四十名学生组成。
He is a little over forty .	他四十多岁了。
It is forty years since I began studying japanese .	我开始学习日语已有四十年了。
Our class has forty-five students .	我们班有四十五名学生。

我的班由四十名学生组成。

他四十多岁了。

我开始学习日语已有四十年了。

我们班有四十五名学生。