Biz bu konuyu birlikte araştırıyoruz.

Yes. In Turkish, the verb ending -uz already shows the subject is we.

• araştırıyoruz = we are researching / we research
• So biz is optional.

Including biz can:

• add emphasis,
• make the subject clearer,
• contrast with someone else.

So:

• Bu konuyu birlikte araştırıyoruz. = We are researching this topic together.
• Biz bu konuyu birlikte araştırıyoruz. = also We are researching this topic together, but with a bit more emphasis on we.

Bu means this.

In Turkish, demonstratives like bu usually come before the noun they describe:

• bu konu = this topic

That is similar to English word order:

• this topic
• bu konu

In the sentence, the noun becomes konuyu because it takes an extra ending, but bu still stays before it:

• bu konuyu = this topic as the object of the verb

Because konu is the direct object of the verb, and in Turkish a specific / definite direct object usually takes the accusative ending.

• konu = topic
• konuyu = the topic / this topic as the object

Here, bu konu is specific, so Turkish uses the accusative:

• bu konuyu araştırıyoruz = we are researching this topic

Breakdown:

• konu = topic
• -yu = accusative ending

Turkish often uses a buffer consonant when a suffix is added after a word ending in a vowel.

Since konu ends in a vowel, Turkish inserts -y- before the accusative ending:

• konu + u would be awkward
• so it becomes konu + y + u = konuyu

This -y- does not have a meaning by itself. It just helps pronunciation.

You will see this in many words:

• masa → masayı
• araba → arabayı
• konu → konuyu

It can be broken down like this:

• araştır- = verb stem, research / investigate
• -ıyor- = present continuous marker
• -uz = we

So:

• araştırıyoruz = we are researching

Full structure:

• araştır-ıyor-uz

Because of vowel harmony and sound patterns, the continuous suffix appears here as -ıyor, not -iyor.

The present continuous suffix has four forms:

• -ıyor
• -iyor
• -uyor
• -üyor

Which one appears depends on vowel harmony.

The verb stem here is araştır-. The last vowel before the suffix is ı, so the suffix becomes -ıyor:

• araştır-ıyor

Examples:

• geliyor = he/she is coming
• bakıyor = he/she is looking
• oturuyor = he/she is sitting
• görüyor = he/she is seeing

So araştırıyoruz is normal vowel harmony.

Birlikte means together.

It describes how the action is done:

• birlikte araştırıyoruz = we are researching together

It is an adverb here.

Related idea:

• birlik = unity / togetherness
• birlikte = together

In this sentence, it tells us that we are doing the research jointly.

In Turkish, adverbs often come before the verb, especially in neutral word order.

So this is very natural:

• Biz bu konuyu birlikte araştırıyoruz.

Turkish word order is flexible, but the most neutral pattern is often:

• Subject + Object + Adverb + Verb

That is exactly what we have here:

• Biz = subject
• bu konuyu = object
• birlikte = adverb
• araştırıyoruz = verb

Yes. Turkish word order is flexible, and changing it can shift the emphasis.

The most neutral version is:

• Biz bu konuyu birlikte araştırıyoruz.

But you could also hear:

• Bu konuyu birlikte araştırıyoruz.
• Birlikte bu konuyu araştırıyoruz.
• Bu konuyu biz birlikte araştırıyoruz.

These all keep roughly the same basic meaning, but the focus changes. Turkish often puts the most important or emphasized element closer to the verb.

Still, for learners, the original order is a very good standard pattern to follow.

Formally, it is the present continuous:

• araştırıyoruz = we are researching

But in Turkish, the present continuous can also sometimes be used in contexts where English might use the simple present, depending on meaning and situation.

In this sentence, the most natural interpretation is:

• We are researching this topic together.

If you wanted a more habitual or general meaning like we research this topic together, Turkish might use a different form such as the aorist, depending on context.

Yes, absolutely:

• Bu konuyu birlikte araştırıyoruz.

This is completely natural Turkish.

Because the ending -uz already tells you the subject is we, Turkish often leaves out subject pronouns unless they are needed for:

• emphasis,
• contrast,
• clarity.

So both are correct, but the version without biz is often more natural in everyday speech unless you want to stress we.

Because Turkish is usually a verb-final language.

A very common Turkish sentence pattern is:

• Subject + Object + Verb or
• Subject + Object + Adverb + Verb

So in this sentence, the verb araştırıyoruz comes last.

This is one of the biggest differences from English, where the verb usually comes earlier:

• English: We are researching this topic together.
• Turkish: We this topic together are-researching.

So the final verb position is normal and expected in Turkish.