החדר שלה חשוך בבוקר, כי העץ הגדול מול החלון.

In Hebrew, the verb to be is usually omitted in the present tense.

So:

• החדר שלה חשוך = Her room is dark
• העץ הגדול מול החלון = The big tree is in front of / opposite the window

This is completely normal Hebrew.
If you wanted to be more explicit, you could sometimes add a word like נמצא (is located) or עומד (stands), but it is often unnecessary.

שלה literally means of her.

So:

• החדר שלה = the room of her = her room

This is a very common way to show possession in modern Hebrew.

Related forms are:

• שלי = mine / my
• שלך = yours
• שלו = his
• שלה = hers / her
• שלנו = our

A native English speaker may expect the possessive word to come before the noun, but in Hebrew this kind of possession usually comes after it.

Because the noun is definite: we are talking about her room, a specific room.

Hebrew usually makes possessed nouns definite, so:

• החדר שלה = her room
• literally: the room of her

Without ה, חדר שלה would sound less natural in most normal contexts.

Because חדר (room) is a masculine noun.

Hebrew adjectives must agree with the noun in gender and number.

So:

• חדר חשוך = a dark room
• החדר חשוך = the room is dark

If the noun were feminine, the adjective would usually change:

• החדר חשוך = the room is dark
• הדירה חשוכה = the apartment is dark

In Hebrew, adjectives usually come after the noun they describe.

So:

• העץ הגדול = the big tree
• literally: the tree the-big

This is the normal word order in Hebrew.

English says:

• the big tree

Hebrew says:

• the tree big

Because in Hebrew, when a noun is definite, its adjective must also be definite.

So:

• עץ גדול = a big tree
• העץ הגדול = the big tree

Both words need to match in definiteness.

This is a very important Hebrew pattern:

• noun + adjective
• and they agree in gender, number, and definiteness

מול means opposite, facing, or sometimes in front of, depending on context.

In this sentence, מול החלון most likely means:

• in front of the window
• or facing the window

So the idea is that the tree is positioned in a way that blocks light from the window.

A learner should know that מול does not always mean physical closeness right in front of something; sometimes it simply means across from or opposite.

Because ב־ means in or at, so:

• בבוקר = in the morning

This form comes from:

• ב־
  • הבוקר

In pointed Hebrew, this becomes בַּבֹּקֶר.
In normal unpointed spelling, it is written בבוקר.

So a useful way to think of it is:

• בוקר = morning
• בבוקר = in the morning

Because the sentence refers to a specific, known window — presumably the window of the room.

Hebrew often uses the definite article ה־ where English would also say the:

• מול החלון = in front of the window

If it said מול חלון, that would sound more like in front of a window, which is less natural here.

Not always. כי can have more than one meaning in Hebrew, depending on context.

Common meanings include:

• because
• that
• sometimes other literary uses

In this sentence, it clearly means because:

• כי העץ הגדול מול החלון = because the big tree is in front of the window

So here it introduces the reason why the room is dark in the morning.

Yes. It is natural Hebrew to say:

• העץ הגדול מול החלון

This is a verbless present-tense clause, which Hebrew uses very often.

However, if someone wanted to make it more explicit, they could say:

• העץ הגדול נמצא מול החלון = the big tree is located in front of the window
• העץ הגדול עומד מול החלון = the big tree stands in front of the window

The original version is shorter and very normal.

Yes, Hebrew word order is somewhat flexible.

For example, you could also say:

• בבוקר החדר שלה חשוך...

This puts more emphasis on in the morning.

But the original:

• החדר שלה חשוך בבוקר...

is also completely natural.

So the basic meaning stays the same, but the focus can shift a little depending on word order.