הגינה שלנו יפה באביב.

A natural breakdown is:

• הגינה = the garden
• שלנו = our / more literally of us
• יפה = beautiful
• באביב = in spring / in the spring

So the whole sentence means:

Our garden is beautiful in spring.

A simple pronunciation guide is:

ha-gina shelanu yafa ba-aviv

Because in present-tense Hebrew, the verb to be is usually not stated in sentences like this.

So:

• הגינה שלנו יפה = Our garden is beautiful

There is no separate present-tense word for is here.

But in other tenses, Hebrew does use forms of to be:

• הגינה שלנו הייתה יפה באביב = Our garden was beautiful in spring
• הגינה שלנו תהיה יפה באביב = Our garden will be beautiful in spring

So the missing is is completely normal.

In Hebrew, possession is often expressed with של plus a pronoun.

So:

• שלנו literally means of us
• הגינה שלנו literally means the garden of us
• natural English: our garden

This is one of the most common ways to say possession in modern Hebrew.

English puts our before the noun, but Hebrew often puts the possession phrase after the noun.

The prefix ה־ is the Hebrew definite article, meaning the.

So:

• גינה = garden
• הגינה = the garden

In this sentence, הגינה שלנו means our garden. Hebrew commonly keeps the noun definite here, because our garden is already a specific, definite thing.

Compare:

• הגינה שלנו = our garden
• גינה שלנו = a garden of ours / one of our gardens

So the ה־ helps show that this is a specific garden.

Because גינה is a feminine singular noun, and the adjective has to agree with it.

The interesting part is that, without vowel marks, יפה can represent different pronunciations:

• with a masculine singular noun: yafe
• with a feminine singular noun: yafa

Since גינה is feminine, the correct pronunciation here is yafa.

So:

• גן יפה = a beautiful garden courtyard/park-like garden, with masculine גן
• גינה יפה = a beautiful garden, with feminine גינה

Same spelling in regular Hebrew writing, different pronunciation from context.

Because here יפה is a predicate adjective, not part of a noun phrase.

There is an important difference between:

• הגינה יפה = The garden is beautiful
• הגינה היפה = The beautiful garden

In the first one, יפה is describing the subject as the predicate: is beautiful.
In the second one, היפה is directly attached to the noun: the beautiful garden.

So in your sentence:

• הגינה שלנו יפה = Our garden is beautiful

If you wanted our beautiful garden, you would say something like:

• הגינה היפה שלנו

Because Hebrew prepositions are often attached directly to the word that follows them.

Here, ב־ means in.

So:

• ב + אביב = באביב

This is very normal in Hebrew. Small prepositions like ב־ (in), ל־ (to/for), and כ־ (as/like) are usually written as prefixes.

So באביב is simply the Hebrew way of writing in spring or in the spring.

In this sentence, it can be understood as either in spring or in the spring, depending on how natural English is being used.

Hebrew often uses season words a bit differently from English. In everyday translation, the best English here is usually:

• Our garden is beautiful in spring

A more literal version may sound like:

• Our garden is beautiful in the spring

Both are fine as translations of באביב here.

Yes. This is a very natural Hebrew sentence structure:

• הגינה שלנו = subject
• יפה = predicate adjective
• באביב = time phrase

So the pattern is basically:

subject + description + time expression

That said, Hebrew word order is somewhat flexible, and you can move באביב for emphasis:

• באביב הגינה שלנו יפה = In spring, our garden is beautiful

Both are grammatical, but your original sentence is very standard and neutral.