Questions & Answers about Я положил кусочек сыра на хлеб.
What form is положил?
Положил is the past tense, masculine singular form of положить.
So this tells you:
- the action happened in the past
- the subject is singular
- the speaker is grammatically masculine
Examples:
- Я положил — if a man is speaking
- Я положила — if a woman is speaking
- Они положили — they put
Also, положить is a perfective verb, so it presents the action as completed: I put / I placed.
Why is the verb положил and not клал?
Russian often uses a perfective verb when talking about a single completed action.
- положил = put / placed as a finished act
- клал = was putting / used to put / put repeatedly, depending on context
In this sentence, the speaker is talking about one finished action, so положил is the natural choice.
A useful verb pair to learn is:
- класть — imperfective
- положить — perfective
You may hear ложить in colloquial speech, but it is generally considered nonstandard in modern standard Russian, so learners should normally use класть / положить.