on time、in time、at time，這些表達(dá)往往只替換了一個(gè)介詞，但意思卻差很遠(yuǎn)。at time 有時(shí)、in time 及時(shí)、on time準(zhǔn)時(shí)。

on time的含義及用法

on time意為準(zhǔn)時(shí);按時(shí)。例句有：

1、They are unlikely to get here on time, I fear.

恐怕他們不大可能準(zhǔn)時(shí)到達(dá)這里。

2、We worked like crazy to get it done on time.

我們拼命地干，好按時(shí)完成這項(xiàng)工作。

3、It was a real struggle to be ready on time.

要按時(shí)做好準(zhǔn)備確非易事。

4、You'll have to leave soon to make certain of getting there on time.

你得快點(diǎn)出發(fā)，好確保準(zhǔn)時(shí)到達(dá)那里。

5、Please make every endeavour to arrive on time.

請(qǐng)盡全力按時(shí)到達(dá)。

6、It was very fortunate for him that I arrived on time.

算他運(yùn)氣好，我準(zhǔn)時(shí)到了。

in time的含義及用法

in time意為及時(shí);合拍;最終;遲早。例句有：

1、I hope we get there in time.

我希望我們及時(shí)到達(dá)那里。

2、Did you get your article done in time?

你的論文按時(shí)完成了嗎?

3、Going into the hotel is like stepping back in time.

走進(jìn)這家旅館就像是回到了過去。

4、We were all running around trying to get ready in time.

我們東奔西跑，望能按時(shí)準(zhǔn)備就緒。

5、I've been working like nobody's business to get it finished in time.

為按時(shí)完成任務(wù)，我一直在快馬加鞭地工作

at time用法

意思是“當(dāng)時(shí)，那時(shí)”“接著，于是，然后”“還有，而且”“那么，因此”，作“那時(shí)”解時(shí)可指過去，也可指將來。常用于句首或句末，用來緩和語(yǔ)氣，作“然后”解時(shí)常位于and之后，所修飾的詞語(yǔ)之前，起連接作用。