From Wiktionary, the free dictionary
عَلِمْتُمْ • (ʕalimtum) (form I) /ʕa.lim.tum/
- second-person masculine plural past active of عَلِمَ (ʕalima)
علمتم (form II)
- عَلَّمْتُمْ (ʕallamtum) /ʕal.lam.tum/: second-person masculine plural past active of عَلَّمَ (ʕallama)
- عُلِّمْتُمْ (ʕullimtum) /ʕul.lim.tum/: second-person masculine plural past passive of عَلَّمَ (ʕallama)