as yet 迄今为止

　　例句：How this might pertain to choices that people might make is, as yet, unclear. 这些方式怎样附属于人们可能做出的选择至今仍未明了。

　　at present 现在,目前

　　?例句：At present I do not have information on the meeting you asked about.

　　至于是否有你提到的会见，我现在还没有这方面的消息。

　　by far 到目前为止;最

　　?例句：Sean: The “writing fast” advice is some of the best advice I have as a writer, by far.

　　肖恩：关于如何“快速写作”的忠告，是到目前为止我作为一名作家最有发言权的。

　　even now 即使在现在

　　?例句：Even now, it hurts me to think that someone who had so much hardship in life should have suffered so at the end.

　　甚至现在，一想到一个在生活中经历了那么多艰难的人到头来竟然还要经受如此苦难，我就非常难过。

　　ever since 从那时起一直到现在

　　?例句：So ever since then and when I came back to Princeton, then we formed a center to study those problems.

　　所以从那以后，在我回到普林斯顿大学时，我们组成了一个中心研习这些问题。

　　for the moment 暂时;目前

　　?例句：He was just going to speak when he thought better of it and didn't mention it for the moment.

　　他刚想开口说话， 但一转念， 觉得还是暂时不提为好。

　　for the time being 暂时,眼下

　　例句：We could undertake the work for the time being.

　　我们可以暂时从事这项工作。

　　not yet 尚未(到目前为止某事没有发生)

　　?例句：Some of the mountains in America have not yet been mapped out.

　　美洲有些山脉还没有在地图上标出来。

　　on the spot 在现场,当场;立即

　　?例句：They help enforce it by going to markets, buying salt and testing it on the spot.

　　她们去市场购买盐当场测试含碘量，以此推动这项运动的实施。

　　so far 迄今为止;到目前为止

　　?例句：So far, they appear to be up to the task.

　　到目前为止，他们表现出承担了这一任务。

　　to date 到目前为止,迄今

　　?例句：To date, all patients under investigation have received treatment with this drug.

　　到目前为止，接受调查的所有病人都使用这种药物进行治疗。