How to sign: at or in the front
"I see the lights of a town ahead"; "the road ahead is foggy"; "staring straight ahead"; "we couldn't see over the heads of the people in front"; "with the cross of Jesus marching on before";
Similiar / Same: ahead, in front
How to sign: earlier in time; previously
"I had known her before"; "as I said before"; "he called me the day before but your call had come even earlier"; "her parents had died four years earlier"; "I mentioned that problem earlier";
Similiar / Same: earlier