an (Greek #302)
a primary particle, denoting a supposition, wish, possibility or uncertainty
KJV usage: (what-, where-, wither-, who-)soever. Usually unexpressed except by the subjunctive or potential mood. Also contracted for 1437.
Pronounce: an
ei (Greek #1487)
if, whether, that, etc.
KJV usage: forasmuch as, if, that, (al-)though, whether. Often used in connection or composition with other particles, especially as in 1489, 1490, 1499, 1508, 1509, 1512, 1513, 1536, 1537. See also 1437.
Pronounce: i
Origin: a primary particle of conditionality
kai (Greek #2532)
and, also, even, so then, too, etc.; often used in connection (or composition) with other particles or small words
KJV usage: and, also, both, but, even, for, if, or, so, that, then, therefore, when, yet.
Pronounce: kahee
Origin: apparently, a primary particle, having a copulative and sometimes also a cumulative force