Questions & Answers about Босс пришёл утром.
Пришёл is the past masculine singular form of прийти, which means to come / to arrive in a completed sense.
In this sentence, it means the boss came/arrived at some point in the morning. It presents the action as a finished event, so пришёл is the natural choice.
By contrast:
- приходил is from приходить, the imperfective partner.
- приходил often means was coming / came by / used to come, depending on context.
- It does not focus on the completed arrival in the same way.
So:
- Босс пришёл утром. = the boss arrived in the morning.
- Босс приходил утром. = the boss came by in the morning / was here in the morning / possibly used to come in the morning, depending on context.
Russian past tense verbs agree with the subject in gender and number.
Since босс is a masculine singular noun, the verb takes the masculine singular past form:
- masculine: пришёл
- feminine: пришла
- neuter: пришло
- plural: пришли
So if the subject changed, the verb would change too:
- Начальница пришла утром. = the female boss came in the morning.
- Боссы пришли утром. = the bosses came in the morning.