He is deeply involved in the animal liberation movement.

Protozoans are single-celled organisms.

As the name suggests, chordates are a group of animals that have a notochord.

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.