ahead of

同义词：

forward | before | in front | in advance | onward | on | along | forth | first | advance | in | front | leading | winning | forwards | in the future | to come | early | prematurely | fast | gaining | or | in the lead | beforehand | out front | onwards | forrader |

反义词：

back | behind |

词义辨析：

同义参见:

over