Ben raporu sisteme yüklüyorum.

I am uploading the report to the system.

Breakdown of Ben raporu sisteme yüklüyorum.

• ben: I
• rapor: the report
• sistem: the system
• yüklemek: to upload

Questions & Answers about Ben raporu sisteme yüklüyorum.

Why is it raporu and not rapor?

Turkish marks a definite/specific direct object with the accusative suffix -(y)I. Since "the report" is specific, rapor becomes raporu. The last vowel of rapor is o, so vowel harmony picks -u.

• Indefinite object: sisteme rapor yüklüyorum or sisteme bir rapor yüklüyorum ("I am uploading a report").
• Definite object: raporu sisteme yüklüyorum ("I am uploading the report").

What does sisteme mean and why the ending -e?

-e/-a is the dative case, marking direction/goal ("to/into/onto"). sistem + -e → sisteme because the last vowel is front unrounded, so choose -e. Compare:

• sistemde (locative, -de/-da): "in/on the system"
• sistemden (ablative, -den/-dan): "from the system"

How is yüklüyorum formed from yüklemek?

Breakdown: yükle- + -(I)yor + -um → yüklüyor + um → yüklüyorum.

• The present continuous is -(I)yor.
• When the stem ends in a vowel (here -e), you add -yor and the preceding vowel raises; with rounded harmony in verbs like yüklemek/söylemek, that raised vowel becomes ü: yükle-yor → yüklüyor.
• Personal ending for 1st singular is -um, chosen by harmony with the last vowel before it (the o in -yor), giving yüklüyorum. Note: yükliyorum is incorrect.

Why is the ending -um and not -im/-ım/-üm?

Personal endings obey vowel harmony. The 1st person singular after -yor is selected by the last vowel before it, which is o. That calls for the back rounded option -um: yüklüyor + um → yüklüyorum.

Do I need to say Ben?

No. The verb already shows the subject with -um. Raporu sisteme yüklüyorum is complete. Use Ben for emphasis/contrast (e.g., Ben yüklüyorum, sen değil).

Can I change the word order?

Yes, Turkish is flexible, but the neutral order is S–O–V:

• Neutral: (Ben) raporu sisteme yüklüyorum.
• Focus on destination: Sisteme raporu yüklüyorum.
• Strong focus on the subject: Raporu sisteme ben yüklüyorum. The finite verb typically stays at the end.

How would I say it with a pronoun, like "I’m uploading it"?

Use the accusative pronoun before the verb: Onu sisteme yüklüyorum.
If the thing is near/visible and demonstrative, you can say Bunu sisteme yüklüyorum.

What are the negative and yes/no question forms?

• Negative: insert -me/-ma right before -yor → (Ben) raporu sisteme yüklemiyorum.
• Yes/no question: add the clitic mi (harmonized) as a separate word after the verb complex, then add the personal ending to it → Raporu sisteme yüklüyor muyum?
  Here it’s mu because the last vowel of yüklüyor is o; plus 1sg → muyum.

When would I use yüklerim instead of yüklüyorum?

Yüklerim is the aorist (habitual/generic): "I upload (as a rule/whenever needed)".
Yüklüyorum is the present continuous (right now/ongoing or scheduled near-future).
Examples:

• Genelde sabahları raporları yüklerim.
• Şu an raporu sisteme yüklüyorum.

Does yüklemek also mean "to install" or other things?

Yes. Yüklemek can mean:

• to upload/load (files, data)
• to install (software; also kurmak is common)
• to charge/load (a card, balance) Context clarifies. For "download," use indirmek.

Could raporu mean "his/her report"?

On its own, raporu can be 3rd-person possessive in the nominative ("his/her report") or accusative of rapor ("the report"). In this sentence it is accusative.
If you mean "his/her report" as the object, you say raporunu (possessive + accusative): Onun raporunu sisteme yüklüyorum.

Do I need an explicit "now" like şimdi?

Not necessary. -yor already implies an ongoing action. Add şimdi/şu anda only for extra clarity or emphasis: Şu anda raporu sisteme yüklüyorum.

Any tip on stress/pronunciation?

In forms with -yor, primary stress falls on the syllable before -yor. So say yüklüYOrum with stress on lü, not on -yor-. Also keep the front rounded vowel ü in both syllables: yük-lü-yo-rum.