Başucu lambam komodinin üstünde duruyor.

Because başucu lambam means my bedside lamp, not just lamp.

• lamba = lamp
• başucu lambası = bedside lamp
• başucu lambam = my bedside lamp

Here, başucu literally means something like bedside or at the head of the bed. Turkish often makes this kind of noun phrase by putting one noun before another.

Also, when you add my, the ending changes:

• başucu lambası = bedside lamp
• başucu lambam = my bedside lamp

So -m is showing my.

Başucu is made of:

• baş = head
• ucu = end/tip/side

Together, başucu refers to the place by the head of a bed, so in everyday English it corresponds to bedside.

That is why başucu lambası / başucu lambam means bedside lamp / my bedside lamp.

The ending -m is the 1st person singular possessive suffix, meaning my.

So:

• lamba = lamp
• lambam = my lamp

Since lamba already ends in a vowel, Turkish adds the possessive directly:

• lamba + -m → lambam

This is very common:

• kitap → kitabım = my book
• araba → arabam = my car
• lamba → lambam = my lamp

Because Turkish uses the pattern:

X-in üstünde = on X / on top of X

So here:

• komodin = nightstand / bedside table
• komodinin = of the nightstand
• komodinin üstünde = on the nightstand / on top of the nightstand

This is because üst is really a noun meaning top / upper part / surface, so Turkish structures it more literally as:

the nightstand’s top-on

That sounds strange in English, but it is completely normal in Turkish.

Üstünde can be broken down like this:

• üst = top, upper side
• -ü = its
• -nde = in/on/at

So üstünde literally means on its top or on top of it.

In the full phrase:

• komodinin üstünde

the meaning is on top of the nightstand.

This is a very common pattern in Turkish:

• masanın üstünde = on the table
• sandalyenin altında = under the chair
• evin önünde = in front of the house

Yes, durmak often literally means to stand or to stay, but for objects it is also very commonly used to mean that something is sitting/standing/located somewhere.

So in this sentence, duruyor does not necessarily mean the lamp is physically upright in a dramatic way. It just means it is there, positioned there.

English often uses is for this kind of idea, but Turkish often prefers a more specific verb such as:

• duruyor = is standing / is sitting / is there
• bulunuyor = is located
• sometimes just context with no extra emphasis

So Başucu lambam komodinin üstünde duruyor is a natural way to say that the lamp is on the nightstand.

Duruyor is in the present continuous form, built with -yor.

• dur- = stand, stay
• duruyor = is standing / is staying / is sitting there

In Turkish, the -yor form is used very often, and it can correspond to English:

• is standing
• is sitting
• sometimes even a simple present-like meaning depending on context

Here, the best natural English translation is something like is on the nightstand or is sitting on the nightstand.

Because Turkish normally puts the verb at the end.

This sentence follows a very typical Turkish order:

• Başucu lambam = my bedside lamp
• komodinin üstünde = on the nightstand
• duruyor = is standing/is there

So the pattern is basically:

subject + place + verb

That is one of the most common word orders in Turkish.

In some contexts, yes, but the meaning and style would change.

For example:

• Başucu lambam komodinin üstünde.

This is also natural and means My bedside lamp is on the nightstand.

Adding duruyor makes the sentence a little more explicit and vivid, as if you are describing where the lamp is positioned.

So:

• ... üstünde. = simple statement of location
• ... üstünde duruyor. = the lamp is standing/sitting there

Both are possible, but duruyor gives a stronger sense of physical placement.

Usually, yes. Komodin commonly means a nightstand or bedside table.

So komodinin üstünde most naturally suggests on the nightstand.

Depending on context, a dictionary may give slightly different furniture-related translations, but in a sentence with başucu lambam, nightstand is clearly the most natural reading.