Cutia are o formă simplă.

In Romanian, the definite article is usually attached to the end of the noun instead of being a separate word like the in English.

• cutie = a box / box
• cutia = the box

So -a here is the definite article attached to the noun.

The base form is cutie, which means box.

Romanian dictionaries usually list nouns in their indefinite form, so you would look up cutie, not cutia.

This is a very common point of confusion.

In Romanian, are is a form of the verb a avea, meaning to have.

• a avea = to have
• are = he/she/it has

So in Cutia are o formă simplă, are means has, not are.

Because the sentence expresses possession, not identity or description with to be.

• Cutia este simplă = The box is simple
• Cutia are o formă simplă = The box has a simple shape

Romanian uses a avea just like English uses to have in this kind of sentence.

O is the feminine singular indefinite article, meaning a or an.

• o formă = a shape

Romanian articles must agree with the gender and number of the noun:

• un for masculine/neuter singular nouns
• o for feminine singular nouns

Because formă is feminine singular, it takes o.

It can mean both, depending on context.

• as an article: o formă = a shape
• as a number: o cutie can also mean one box, depending on emphasis and context

In this sentence, o is just the indefinite article: a.

In Romanian, adjectives usually come after the noun.

So the normal order is:

• formă simplă = simple shape

You can sometimes put the adjective before the noun, but that is less neutral and often sounds more literary, expressive, or stylistically marked. For a basic sentence, formă simplă is the standard order.

Because the adjective must agree with the noun it describes.

Here, simplă describes formă, which is:

• feminine
• singular

So the adjective also has to be feminine singular.

Compare:

• un obiect simplu = a simple object
• o formă simplă = a simple shape

The ending changes to match the noun.

Formă is a feminine noun.

That is why you get:

• o formă = a shape
• forma = the shape
• simplă = feminine singular form of simple

Normally, no. That would sound unnatural in standard Romanian.

Because formă is a singular countable noun here, Romanian normally uses the indefinite article:

• Cutia are o formă simplă

So this works like English The box has a simple shape, not The box has simple shape.

A simple approximate pronunciation is:

koo-TEE-ah AH-reh o FOR-muh SEEM-pluh

A few helpful points:

• ti in cutia sounds like tee
• are has two clear syllables: a-re
• ă is a short central vowel, something like the unstressed vowel in sofa
• Romanian words are generally pronounced clearly, with fewer reduced sounds than in English

The usual stress pattern is:

• cu-TI-a
• A-re
• FOR-mă
• SIM-plă

Stress is important in Romanian, and it does not always fall where an English speaker might expect.

Romanian does allow more flexibility than English, but the most neutral order here is:

• Cutia are o formă simplă.

This is the standard subject + verb + object pattern.

Other orders may be possible in special contexts, but for learning and normal usage, this is the best version to use.

Here is the breakdown:

• Cutia — noun with definite article attached, functioning as the subject
• are — verb, 3rd person singular of a avea
• o — feminine singular indefinite article
• formă — noun, direct object
• simplă — adjective describing formă

That is simply one of the characteristic features of Romanian grammar. Unlike English, Romanian usually uses a suffixed definite article.

Compare:

• English: the box
• Romanian: cutia

This is very common in Romanian and something learners get used to quickly. It applies to many nouns, though the exact ending depends on the noun’s gender, number, and form.