Questions & Answers about Лікар оглянув хребет.
Because лікар is the subject of the sentence, it is in the nominative singular — the basic dictionary form.
A few useful points:
- лікар is a grammatically masculine noun
- in this sentence, the verb оглянув is also masculine, so the doctor is understood as male
- if the doctor were female, you could see:
- Лікарка оглянула хребет.
- Лікар оглянула хребет.
This is also possible in real Ukrainian, because лікар can refer to a woman too, depending on style and context.
Оглянув is a past tense masculine singular form.
In Ukrainian, past tense verbs agree with the subject in gender and number:
- оглянув — he examined
- оглянула — she examined
- оглянуло — it examined
- оглянули — they examined
So лікар оглянув tells you the subject is singular and masculine.