ahead
形容词 ahead:
having the leading position or higher score in a contest
同义词:in the lead, leading
副词 ahead:
at or in the front
toward the future; forward in time
同义词:forward
in a forward direction
同义词:onward, onwards, forward, forwards, forrader
ahead of time; in anticipation
同义词:in advance, beforehand
to a more advanced or advantageous position
to a different or a more advanced time (meaning advanced either toward the present or toward the future)
leading or ahead in a competition
同义词:out front, in the lead