tense (a grammatical category expressing time distinctions such as past, present, future).
英語の時制には現在完了や過去完了など、日本語にない形もある。
English tenses include forms like the present perfect and past perfect, which don't exist in Japanese.
この章で時制の使い分けを練習しましょう。
Let's practice distinguishing the uses of tenses in this chapter.
初級ではまず現在形と過去形の時制を習います。
At the beginner level you first learn the present and past tenses.