اشتريت ليتر بنزين.

اشتريت means I bought.

It comes from the verb اشترى / يشتري = to buy. In the past tense, the ending -ت marks I.

So:

• اشتريت = I bought

In Levantine, it is commonly pronounced something like ištarēt or shtarēt.

Because Arabic verbs already show who did the action.

In اشتريت, the ending already tells you the subject is I, so أنا is not necessary.

You can still say:

• أنا اشتريت ليتر بنزين

but that adds extra emphasis, like I bought a liter of gasoline.

Arabic does not have an indefinite article like English a/an.

So a bare noun can already mean:

• ليتر = a liter

If you want to emphasize the number one, you can say:

• ليتر واحد = one liter

But in normal speech, ليتر by itself is enough.

In Arabic, measure expressions often work without a separate word for of.

So:

• ليتر بنزين literally looks like liter gasoline
• but it means a liter of gasoline

This is very common in Arabic. Compare:

• كاسة مي = a glass of water
• كيلو تفاح = a kilo of apples
• ليتر بنزين = a liter of gasoline

In formal Arabic, you may sometimes see من in this kind of phrase, but in Levantine it is often omitted.

A common pronunciation would be:

ištarēt līter benzīn

A rough English-style guide would be:

ish-ta-RAYT LEE-ter ben-ZEEN

A few notes:

• ر is usually a quick tapped r
• the ee sound in -ريت and زين is long
• some speakers reduce the first vowel, so اشتريت may sound closer to shtareet

ليتر is a very common borrowed word meaning liter.

It is widely used in everyday Levantine speech. You may also see the spelling لتر, especially in more formal or standard writing.

So:

• ليتر = common colloquial-style spelling
• لتر = also correct and common, especially in more formal contexts

Both refer to the same thing.

Yes, you can.

Both are possible:

• اشتريت ليتر بنزين
• أنا اشتريت ليتر بنزين

The version without أنا is more neutral and concise.
The version with أنا puts a little more focus on I.

In Arabic, word order is somewhat flexible, but not every order sounds equally natural. For this sentence, these two are the most normal choices.

Because بنزين here is being used as an unspecified mass noun, which is very natural in Arabic.

So:

• ليتر بنزين = a liter of gasoline

If you say البنزين, it sounds more specific, like the gasoline already known from the context.

So in this sentence, the bare form بنزين is the normal choice.

A more formal MSA version could be:

اشتريتُ لترًا من البنزين

Compared with the Levantine sentence:

• اشتريت ليتر بنزين

Main differences:

• MSA uses case endings: اشتريتُ, لترًا
• MSA is more likely to include من = of/from
• Levantine normally drops case endings in speech
• Levantine often says the measure phrase directly, without من

So the Levantine version is shorter and more natural for everyday spoken language.

You change the measure word:

• ليتر بنزين = a liter of gasoline
• ليترين بنزين = two liters of gasoline
• ثلاثة ليترات بنزين = three liters of gasoline

So the pattern stays the same:
amount + measure word + substance

That makes this sentence a useful model for many similar phrases.