Я лично проверил документ.

I personally checked the document.

Breakdown of Я лично проверил документ.

• я: I
• проверить: to check
• документ: the document
• лично: personally

Questions & Answers about Я лично проверил документ.

How do you pronounce this sentence, and where is the stress?

A natural pronunciation is:

Я ли́чно прове́рил докуме́нт.

Stress falls on:

• ли́чно
• прове́рил
• докуме́нт

A rough English-style approximation is:

ya LEECH-na pra-VYE-ril da-ku-MYENT

That said, Russian pronunciation does not match English exactly, so this is only a guide.

What tense is проверил, and how is it formed?

Проверил is past tense.

It comes from the infinitive проверить (to check / to verify). In the past tense, Russian often adds -л to the verb stem:

• проверить → проверил for a masculine speaker

So the sentence describes a completed action in the past: I checked / verified the document.

Why does the verb end in -ил? Does it show that the speaker is male?