Permukaan ini bersih.

• permukaan = surface
• ini = this
• bersih = clean

So the structure is literally surface this clean, which in natural English is This surface is clean.

Malay often leaves out the verb to be in simple sentences like this.

So instead of saying something like This surface is clean with a separate word for is, Malay simply says:

• Permukaan ini bersih = This surface is clean

This is completely normal. In many everyday Malay sentences, the relationship that English expresses with is/are is understood without adding a separate word.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun.

So:

• permukaan ini = this surface
• permukaan itu = that surface

This is different from English, where this comes before the noun.

A very common pattern in Malay is:

• noun + ini/itu

Examples:

• buku ini = this book
• rumah itu = that house

Bersih is basically an adjective, meaning clean.

In Permukaan ini bersih, it works as the predicate of the sentence, so it describes the subject:

• Permukaan ini = the subject
• bersih = what is being said about it

Even though English uses is clean, Malay can simply use the adjective directly.

Yes. Permukaan ini is a noun phrase meaning this surface.

Its internal structure is:

• permukaan = noun
• ini = demonstrative

Together:

• permukaan ini = this surface

Then bersih tells you something about that phrase:

• Permukaan ini bersih = This surface is clean

Not if you want to mean This surface is clean.

For that meaning, the natural wording is:

• Permukaan ini bersih

Why? Because:

• ini usually follows the noun when it means this
• bersih comes after the subject as the description

Ini permukaan bersih would sound unnatural for this meaning.
If ini comes first, it often means this is ..., but then the structure would be different.

So for this surface is clean, stick with:

• Permukaan ini bersih

Just replace ini with itu:

• Permukaan itu bersih = That surface is clean

This is a very useful contrast:

• ini = this
• itu = that

You can use tidak before bersih:

• Permukaan ini tidak bersih = This surface is not clean

Here:

• tidak = not

So the pattern is:

• subject + tidak + adjective

Example:

• Bilik ini besar = This room is big
• Bilik ini tidak besar = This room is not big

A simple way is to use question intonation in speech:

• Permukaan ini bersih? = Is this surface clean?

In more formal or explicit Malay, you can also use adakah:

• Adakah permukaan ini bersih? = Is this surface clean?

Both are understandable, but in everyday conversation, intonation alone is often enough.

A rough guide is:

• per-moo-KAH-an

More roughly:

• per as in purr
• mu like moo
• ka like kah
• an like ahn

And the whole sentence can be approximated as:

• per-moo-KAH-an EE-nee ber-SEEH

A few notes:

• ini sounds like ee-nee
• bersih ends with a clear h sound in careful pronunciation

Yes, it is natural and correct.

It is a straightforward, neutral sentence that sounds normal in everyday Malay. It is also a good example of two important Malay patterns:

1. noun + ini/itu
2. no separate word for is in simple descriptive sentences

So it is a very useful model sentence for learners.