Tra từ now - Từ điển Oxford Advanced Learner 8th

now adverb, conjunction BrE [naʊ] NAmE [naʊ]
adverb
1. (at) the present time
• Where are you living now?
• It's been two weeks now since she called.
•It's too late now.
•From now on I'll be more careful.
•He'll be home by now.
•I've lived at home up till now.
•That's all for now.
2. at or from this moment, but not before
• Start writing now.
• I am now ready to answer your questions.
3. (informal)used to show that you are annoyed about sth
• Now they want to tax food!
• What do you want now?
•It's broken. Now I'll have to get a new one.
4. used to get sb's attention before changing the subject or asking them to do sth
• Now, listen to what she's saying.
• Now, the next point is quite complex.
•Now come and sit down.
•Now let me think…

Word Origin:
Old English nū, of Germanic origin; related to Dutch nu, German nun, from an Indo-European root shared by Latin nunc and Greek nun.
Idioms: ↑now and then ▪ ↑now for somebody ▪ ↑now or never ▪ ↑now then ▪ ↑now what? ▪ ↑now … now … ▪ ↑now, now

conjunction ~ (that)…
because the thing mentioned is happening or has just happened
• Now that the kids have left home we've got a lot of extra space.

Word Origin:
[now] Old English nū, of Germanic origin; related to Dutch nu, German nun, from an Indo-European root shared by Latin nunc and Greek nun.

See also: ↑now then ▪ ↑what is it now?