Anstataŭ resti li foriris, instead of staying he went away.
Vi malhelpas anstataŭ helpi min, you hinder instead of helping me.
Ni venis por helpi vin, we came to help (in order to help) you.
Mi estas preta por iri merkredon, I am ready to go (for going) Wednesday.
Li havos tro multe por fari, he will have too much to do.
Mi laboros antaŭ ol ripozi, I shall work before resting.
Antaŭ ol foriri, li dankis min, before going away, he thanked me.
Dio faris la mondon antaŭ ol doni ĝin al la sezonoj, God made the world before giving it to the seasons.

Substantive is the general name for nouns and pronouns, that is, for words which indicate persons, things, etc., and may be used as subject or object of a verb, complement of a preposition, etc.

The infinitive may be used with antaŭ ol if its subject is the same as the subject of the main verb. Otherwise the construction explained in 97 must be used.

THE EXPRESSION OF A PART OF THE WHOLE.

99. After nouns indicating a quantity or portion of some indefinite whole, the substantive expressing that indefinite whole is preceded by the preposition da, of:

Estas skatolo da ĉerizoj tie, there is a box of cherries there.
Mi trovis grandan sakon da mono, I found a large bag of money.
Li havas teleron da viando, he has a plate of meat.
Post horoj da ĝojo ofte venas horoj da malĝojo, after hours of joy there often come hours of sorrow.

100. The preposition da must not be used if a quantity or portion of a definite or limited whole is expressed. If the word indicating the whole is limited by la, it is thereby made definite:

Telero de la maturaj pomoj, a plate of the ripe apples.
Sako de la bona kafo, a sack of the good coffee.

Vocabulary.

Aleksandro, Alexander.
barelo, barrel.
bruo, noise.
da, of (99).
demandi, to inquire, to ask.
Diogeno, Diogenes.
greka, Greek.
kelkaj, several, some.
kvankam, although.
ĉifono, rag. 		koni, to be acquainted with.
laŭta, loud.
lito, bed.
loĝi, to dwell, to reside.
nombro, number (quantity).
pura, clean.
sufiĉa, sufficient, enough.
veki, to wake.
viziti, to visit.
vesto, garment, clothes.