This animation shows how the irregular verb する — meaning “to do” — changes form. It doesn’t follow the usual patterns of other verbs, but its key forms are short and useful.
Here are some common variations: しない (negative), します (polite), すれば (“if you do”), しよう (“let’s do it”), and できる (“can do”).
The verb する appears in many compound verbs like:
勉強する (to study),
運動する (to exercise), and
復習する (to review).
That’s why it’s one of the most essential verbs to learn.