החדר שלה חשוך בבוקר, כי העץ הגדול מול החלון.

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Breakdown of החדר שלה חשוך בבוקר, כי העץ הגדול מול החלון.

• ב: in
• חדר: room
• בוקר: morning

Questions & Answers about החדר שלה חשוך בבוקר, כי העץ הגדול מול החלון.

Why is there no word for is in this sentence?

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.

How does שלה mean her?

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.

Why is it החדר שלה and not just חדר שלה?