Verb tense usage in English can be confusing, with many "rules" having exceptions. The present tense, for example, usually indicates action happening at the time of speaking, but has several special uses as well.

1. To indicate future actions:
   We leave tomorrow.
   The seminar ends at 2pm.

2. To state general truths:
   The sky is blue.
   The devil finds work for idle hands.

3. To indicate recurring action:
   I walk to school every morning.
   The library closes at midnight.

4. To discuss the content of books, movies, etc:
   H.G. Wells' work explores the human condition through science fiction.
   The movie has lots of action and suspense.