The 8 active forms are easier to recognize through three ending patterns.
ExampleClue
لَيَفْعَلَنْFathah before Light Noon
لَيَفْعَلُنْDhammah before Light Noon in masculine plural
لَتَفْعَلِنْKasrah before Light Noon in singular feminine Haadhir
The Light Noon itself remains a single silent Noon.