adv (1)现在，此刻，目前(at this moment;at the present time)：I am living in England～. 我现在住在英国。I thought so once，but～I know better. 过去我也这样想过，可是现在我明白多了。N～it is clearing up. 天现在放晴了。N～it would be a good time to go to France. 现在是去法国的好时候。It's～25 years since I came here. 我来这里至今已经25年了。N～she began asking questions. 这时她开始发问。

(2)立刻;马上(at once，immediately)：I can't do it～— you'll have to wait. 我这会儿干不了，你得等等。Do come here～. 马上就到这儿来。I must go～or it will be too late. 我这就得走，不然就太晚了。

(3)如今;现时(the present time or moment)[用于介词后] ：The boy must be forty by～. 那孩子如今该有40岁了。The good-bye had lasted until～. 从那次分别直到如今才相见。But he was safe for～. 但他现在是安全的。Have you heard of that before～? 你在这之前听说过吗?

(4)[不表示时间，而表示说话人的语气，包括说明、命令、请求、警告、安慰等]：N～it's no good doing that.得了，那样做是没有用的。N～listen to me. 且听我说。No nonsense～. 别胡说啦。N～what we have to do next is to write to the professor. 好了，下一步我们得给教授写信了。

now and again/then 时而;不时：He still visits me～and then. 他仍不时地来看我。now，now (now then) 好(行)了;[表示告诫或引起注意等]：N～，～，stop crying. 得了，得了，别哭了。N～then，don't worry about it. 行了，别担心啦。

now...now/then时而……时而…… ：N～it's hot then its cold—no one knows what to wear.天气忽冷忽热的，谁也不知穿什么衣服好。

now then 1)(用以引导一个建议或话题)：N～then，how about going fishing? 我说，钓鱼去怎么样? 2)(考虑下一步该做什么或该说什么时用以表示停顿)：I must say I liked that，～then，what's next? 我必须说我很喜欢那个，那么，下一个是什么呢?

now for sb/sth现在到了……;现在是……(用以表示开始(转向)一个新的任务或议题)：The matter is settled. N～for the next question. 这件事解决了，现在来研究下一个问题。

conj既然;由于(because or since something has happened，etc)[常与that连用]：N～that you are here，I can leave. 既然你在这儿，我可以走了。 N～you have left university，you will have to find a job. 既然你已经离开了大学，你得找个工作干。