Yeah, losely it works. If you want to be really strict though, kulewa only means "get/become drunk". It deals with the change from sober to drunk. There is no direct equivalent verb for "be drunk". For this, you use the perfect.
nalewa = I get drunk [present]
melewa = I am drunk / I have gotten drunk [perfect]
To do this in other tenses, if you really do need to distinguish them, you use compound tenses:
lilewa = I got drunk [past]
melewa = I was drunk / I had gotten drunk [past perfect]
talewa = I will get drunk. [future]
melewa = I will be drunk / I will have gotten drunk [future perfect]
kilewa = if I get drunk / (while) getting drunk, ... [situational]
melewa = if I am drunk / if I have gotten drunk / (while) being drunk, ... / having gotten drunk ... [situational perfect]
(PS. You can edit your comments here if you make a mistake. You don't have to write a new one every time you leave out word.)
Is this only the definite "you", i.e. the listener, who will get drunk, or is this also the way to say "if one drinks alcohol, one will get drunk" i.e. the general "you" that we now have in English instead of the more archaic "one"?
If Swahili has the general "you", is it normal to use the singular or plural form?
Is there a (possibly archaic) separate way of saying "one" in Swahili?