Sebelum tidur, saya menutup jendela bilik tidur.

Sebelum tidur means before sleeping or before going to sleep. Malay often puts time expressions at the beginning of the sentence to set the context first.

So:

• Sebelum tidur, saya menutup jendela bilik tidur. = Before sleeping, I close the bedroom window.

You could also put the time phrase later, but starting with it is very natural.

Here, tidur means to sleep in a general sense. After sebelum in this kind of phrase, Malay often uses the bare verb without stating the subject again.

So sebelum tidur literally feels like:

• before sleeping
• before going to sleep

It does not need saya because the main clause already tells you who is doing the action.

Tutup is the base word meaning close or shut.

Menutup is the active verb form built from tutup with the meN- prefix. In standard Malay, this is a very common way to form a transitive verb, meaning a verb that takes an object.

So:

• tutup = close / shut
• menutup = to close something

Because jendela bilik tidur is the object, menutup is the expected standard form here.

This is because of the meN- prefix pattern in Malay.

When meN- is added to a base word starting with t, the t usually drops:

• tutup → menutup
• not mentutup

This is a regular sound-change pattern in Malay verb formation.

Yes, in everyday speech, saya tutup jendela bilik tidur can be understood and may sound more casual or conversational.

But in more careful, standard Malay grammar, saya menutup jendela bilik tidur is the fuller and more formal form.

So a useful contrast is:

• menutup = standard, explicit verb form
• tutup = often heard in casual speech

Both mean window.

• jendela is correct and understandable
• tingkap is also very common, and in many places it is the more everyday word

So this sentence could also be:

• Sebelum tidur, saya menutup tingkap bilik tidur.

Both are fine. The choice may depend on region, style, or personal preference.

Malay often makes noun phrases by putting two nouns together.

• bilik = room
• tidur = sleep / sleeping

So bilik tidur literally means sleeping room, which is the natural Malay way to say bedroom.

This kind of structure is very common in Malay.

It can mean either, depending on context.

Malay does not use articles like the and a/an the way English does. So:

• jendela bilik tidur can mean the bedroom window
• or a bedroom window

Usually the surrounding context tells you which one is meant. In this sentence, English would most naturally translate it as the bedroom window.

In Malay, the main noun usually comes first, and the describing noun comes after it.

So:

• jendela bilik tidur = window of the bedroom = bedroom window

The head noun is jendela (window), and bilik tidur tells you which window.

This is the normal Malay noun order.

Yes, in this sentence saya is the subject, meaning I.

Malay often omits subjects in casual conversation when they are obvious from context, but in a full standalone sentence, including saya is natural and clear.

So:

• Sebelum tidur, saya menutup jendela bilik tidur. = full and clear
• Sebelum tidur, menutup jendela bilik tidur. = incomplete in normal standard usage

No, not by itself.

Malay verbs usually do not change form for tense the way English verbs do. Menutup can refer to present, habitual, or sometimes even past/future, depending on context.

This sentence could mean:

• Before sleeping, I close the bedroom window.
• Before going to bed, I close the bedroom window.

If you wanted to be more specific about time, Malay would usually add time words such as:

• sudah = already
• sedang = in the process of
• akan = will

The comma separates the opening time phrase from the main clause:

• Sebelum tidur, = introductory phrase
• saya menutup jendela bilik tidur. = main clause

This is similar to English punctuation in sentences like:

• Before going to bed, I close the bedroom window.

The comma helps readability, especially in writing.

A few everyday alternatives are possible, depending on region and style:

• Sebelum tidur, saya tutup tingkap bilik tidur.
• Sebelum tidur, saya menutup tingkap bilik tidur.

These all mean basically the same thing. Compared with jendela, tingkap may sound more everyday to many speakers, and compared with menutup, tutup may sound more casual in speech.