赶跑 to force out; to drive away; to repel 赶上 to catch up with; to overtake; to keep up with; in time for; to chance upon 赶时髦 to keep up with the latest fashion ..
2
?赶得上
... express oneself in English 用英语表达自己 in time for赶得上，及时 give sb. one’s sincere congratulations 给某人最衷心的祝愿 ...
3
?及时
... see sb. off 为…送行；送别； in time for及时；不迟； start off 开始；出发； ...