La farbo estas sur la gipso.

• la = the definite article, like the
• farbo = a noun
• estas = the present-tense form of esti, meaning to be
• sur = a preposition meaning on
• la gipso = a noun phrase after the preposition

So grammatically:

• La farbo is the subject
• estas is the verb
• sur la gipso is a prepositional phrase showing location

This is a very normal Esperanto sentence pattern: subject + verb + prepositional phrase.

Because Esperanto uses la for the, and it can be used before any definite noun.

So:

• la farbo = the paint
• la gipso = the plaster

Unlike English, Esperanto has only one definite article: la. It does not change for gender, number, or case.

In Esperanto, nouns normally end in -o.

So:

• farb-o
• gips-o

This makes word class very easy to recognize. If you see -o, you can usually assume the word is a noun.

Related endings you will often see:

• -a for adjectives
• -e for adverbs
• -i for infinitive verbs
• -as for present-tense verbs

Esperanto verbs do not change according to person or number.

So you get:

• mi estas = I am
• vi estas = you are
• li estas = he is
• ili estas = they are

The ending -as always marks the present tense. That makes Esperanto much simpler than English in this area.

Because there is no direct object, and the phrase with sur shows location, not motion.

In Esperanto, -n is often used for:

• the direct object
• direction or motion toward something in some expressions

Here, sur la gipso means the paint is located on the plaster. Nothing is moving, so no -n is needed.

Yes, but it would mean something different.

• sur la gipso = on the plaster, indicating position
• sur la gipson = onto the plaster, indicating movement toward that surface

So:

• La farbo estas sur la gipso = the paint is on the plaster
• If you used sur la gipson, it would suggest motion, which does not fit well with estas in this sentence

A more natural motion example would be something like Mi metas la farbon sur la gipson = I put the paint onto the plaster.

Sur is a preposition. It usually means on or on top of.

In Esperanto, prepositions are very important because they show relationships like:

• sur = on
• en = in
• sub = under
• apud = beside
• super = above

Here sur tells you where the paint is located relative to the plaster.

Not completely. Esperanto word order is fairly flexible, but La farbo estas sur la gipso is the most neutral and straightforward order.

You might also see:

• Sur la gipso estas la farbo

That can sound more literary or emphasize the location first. But for learners, the given order is the best default.

A simple pronunciation guide is:

lah FAHR-bo EH-stahs soor lah GEEP-so

A few useful pronunciation points:

• a sounds like the a in father
• e sounds like the e in bet, but a bit clearer
• i sounds like ee
• o sounds like o in for, but pure and steady
• u sounds like oo
• stress in Esperanto usually falls on the second-to-last syllable:
  • FAR-bo
  • ES-tas
  • GIP-so

It can refer to gypsum, and in many contexts also plaster made from it. The exact English translation depends on context.

So if you are reading or hearing gipso, think of the material sense first. In real usage, the best English equivalent may be gypsum, plaster, or sometimes a more specific term depending on context.

Yes. Leaving out la can make the noun less specifically definite.

For example:

• Farbo estas sur gipso could suggest a more general or less specific statement

But Esperanto often uses la when the speaker has a particular thing in mind, just as English does with the. The sentence La farbo estas sur la gipso sounds like it refers to specific paint and specific plaster already known from the context.