s. having the leading position or higher score in a contest
r. at or in the front
r. toward the future; forward in time
r. in a forward direction
a. 领先的, 预先的, 向前的
adv. 领先, 预先, 向前, 胜于, 在前面, 在将来
1. We need to plan ahead for our vacation.
我们需要提前为我们的假期计划。
2. The road ahead is blocked by construction.
前面的道路被施工封堵了。
3. She is always thinking ahead and making good decisions.
她总是提前思考并做出好的决定。