"ewentualnie", "aż" and "aktualny"

I want to say "ewentualnie", "aż" and "aktualny" (aktualna np. propozycja).
Could someone help me?:)
Thanks

depends on the context of course, can you give some example sentences?

Generally though:

ewentualnie - in any case
aż - until
aktualny - current

You will have to be more specific. It’s hard to explain there are so many uses of the word (aż) I’ll give you couple examples

Aż = till, this or that much, so far as to, until (and many more)

(poczekam, aż wyjdzie) I’ll wait till he leaves, (aż do Londynu) all the way to London, (aż tak dużo?) it costs that much?, (aż za dużo) more than enough, (to nie jest aż takie trudne) it's not as hard as all that (aż strach pomyśleć) one shudders at such a thought (aż za rok) in a year (aż) in this example emphasizes how long of a period of time this is.

In most cases though it will be used as emphasis as in that far, that much etc.

I am not sure this is correct (British) English - you often hear it spoken, but I am sure it should be "until he leaves".

I have already understood az, thank you both

aktualny - for example Propozycja aktualna od jutra
ewentualny - for example Mozesz wydac 10, ewentualnie 15 zl

The proposal is current/(valid) until tomorrow.

You can spend 10, possibly/perhaps/maybe 15 ZLP.

Also worth mentioning that "aktualny" and "actually" are false friends, as are "ewentualnie" and "eventually".

The point is that the Polish word aż means until and unlike the preposition in Polish, do, it does not therefore require the genitive case.

The most common belief is that till is a shortened form of until. But the opposite is true, till as a word precedes until by about 400 years. Until is a compound of till with the archaic Old Norse und, as far as, which also survives in the archaic unto. The first sense of till was to, as it still can be, for example in Scottish dialect, and the modern sense of till in standard English is always connected with time. The current position is that until is the more common of the two words and is generally considered to be slightly more formal. It is also rather more likely to appear at the beginning of a sentence than is till. But till is perfectly good English. e.g. "Till Death Do Us Part". There’s another form of ‘til with preceding apostrophe, it’s informal version of until. Spelling 'til without the preceding apostrophe is still regarded as wrong. E.g. “shop ’til you drop”.

It is a shortened form of until.

Sometimes I just can't resist the temptation to feed the troll...
Michal, just stop. You constantly barge in on threads where a perfectly good answer has already been given, and offer up something which is not only pointless, but invariably wrong. You are this site's greatest drawback. Go away.

Thank you :)
And is there something like Polish "niech"? np. Jeśli chce pomocy, niech o nią poprosi.

niech serves to create imperative form of a verb in 3rd person (both singular and plural) and to express a wish. The closest English word would be "let", which isn't a direct translation of course (let is a verb in English), but can be used in those 2 situations.

Niech wejdzie - Let him in.
Niech (oni) przyjadą - Let them come.

A wish:
Niech tak będzie - Let it be