Help 4 year old learn alphabets

Give him time. You can do home practice with him, like using alpha magnets during play time or even alpha biscuits- when he is snacking. Keep reminding him of the letters. Another way you can relate is using his favorite cartoon characters for some letters- eg, Barney - b for Barney. Things that he can relate well too may help him. All in all, make learning fun. time an patience do play a part here.