The conditional

The conditional mood — would — is a suffix, not a helper verb: -na/-ne (indefinite) and -ná/-né (definite core).

Present conditional

Lát — would see:

Pronoun	Indefinite	Definite
én	látnék	látnám
te	látnál	látnád
ő	látna	látná
mi	látnánk	látnánk
ti	látnátok	látnátok
ők	látnának	látnák
én → téged	látnálak	—

(Yes — 1st person singular indefinite is -nék even for back-vowel verbs: látnék, írnék. One of the few places harmony “breaks”.)

Van → conditional lenne (or volna — interchangeable in most uses):

Jó lenne több időt tölteni együtt.

It would be nice to spend more time together.

Bárcsak itt lennél!

If only you were here!

Politeness — the daily-life conditional

The most frequent use isn’t hypotheticals but softened requests:

Szeretnék egy kávét kérni.

I'd like (to ask for) a coffee.

Tudnál segíteni?

Could you help?

Megtennéd, hogy becsukod az ablakot?

Would you (do me the favour to) close the window?

Szeretnék (I would like) is arguably the single highest-value conditional form — you’ll use it in every shop, café and office.

Ha — if-clauses

Both halves of the sentence go conditional (unlike English, which mixes tenses):

Ha több pénzem lenne, elutaznék Japánba.

If I had more money, I would travel to Japan.

Ha tudnám, megmondanám.

If I knew it, I'd tell you.

Past conditional

Would have = past tense + an invariant volna:

Ha tudtam volna, segítettem volna.

If I had known, I would have helped.

Elmentem volna, de beteg voltam.

I would have gone, but I was sick.

Volna never conjugates in this role — the past-tense verb carries the person.