A regular polyhedron is a polyhedron where all faces are the same shape and all vertices are the same shape.

He stands at the top of the company.

The exam ended and the results were good, so I thought 'all's well that ends well'.

The passive form in Japanese is used differently from English.

This quadrilateral is a square.

By learning the imperfective form, you can understand Japanese grammar more deeply.

Please tell me the singular form of this word.

In English, adding 's' after a noun makes it a plural form.

In Japanese grammar, the hypothetical form is one of the inflectional forms of verbs.

In Japanese, the terminal form is the form that comes at the end of a sentence.