及时是in time还是on time

及时是in time，in是指在……之内，所以不难理解in time可以是指提前完成某事，是及时；on则是指在某一时间点上，是个确切的时间点，on time是指准时。

in time 经过一段时间之后； 迟早； 最后； 终于； 及时，不迟； 合拍，按照节拍；

in time举例：

The taxi skidded to a halt just in time.

出租车滑行了一段路后，及时停了下来。

We managed to get to the airport in time.

我们设法及时赶到了机场。

I arrived just in time for my flight to Hawaii.

我正好及时赶上飞往夏威夷的航班。

They learned to accept their stepmother in time.

过了一段时间之后他们学会了接受他们的继母。

There's a slight chance that he'll be back in time.

他及时赶回来的可能性不大。

I'm in a panic about getting everything done in time.

我处于一阵要把一切及时安排就绪的恐慌中。

You were lucky (that) you spotted the danger in time.

你幸好及时发现了险情。

She worked hard so that everything would be ready in time.

她卖力地干着，为的是一切能够及时就序。

He ducked in time to save his head from a blow from the poker.

他猛地低下头，及时地躲过飞来一棒。

If they can't get it to us in time, we'll just have to do without.

如果他们不能及时给我们拿来，我们就只好将就了。

I felt a need to please people, whatever the cost in time and energy.

我感到一定要使人们满意，耗费多少时间和精力都在所不惜。

They neglected to rearm in time and left the country exposed to disaster.

他们由于疏忽而没有及时重整军备，结果使该国面临灾难。
(www.Ws46.com)

If I had seen the advertisement in time I would have applied for the job.

我要是及时看到了这则广告，我就应聘那份工作了。