Antaux. Post.
"Antaux" means "before" (time), "Ni revenos antaux Mardo", We shall
return before Tuesday, "in front of" (place), "Antaux la domo", Before
the house. Before verbs "antaux ol" is used, as "Lavu vin, antaux ol
mangxi", Wash (yourself) before eating.
"Post" means "after" (time), "behind" (place).
Care must be taken in using "antaux" and "post" to arrange the sentence
so that there can be no doubt as to whether time or place is referred
to. "He came before his father," in place or position, "i.e.", in front
of his father, is "Li venis antaux sia patro", but if "before in time"
is meant, it must be "Li venis antaux ol lia patro" ("venis"). "Li venis
post sia patro" means He came behind his father; if we mean "after his
father came" we may use "kiam", and say "Li venis post, kiam lia patro
venis".
To express "time past," "ago," "antaux" is used, as "Antaux tri tagoj",
Three days ago. "Antaux longe", A long time ago. "Antaux nelonge", Not
long ago.
To express "in" a time to come "post" is used, as I will come in three
days, "Mi venos post tri tagoj". "Post nelonge", In a short time.