Моя собака любит убегать в парк.

my

Breakdown of Моя собака любит убегать в парк.

• собака: the dog
• любить: to love
• в: to

Questions & Answers about Моя собака любит убегать в парк.

Why is it моя собака and not мой собака?

In Russian, possessive pronouns must agree with the grammatical gender (and number, and case) of the noun.

• собака is grammatically feminine (even if the actual dog is male).
• The feminine form of мой is моя.

So:

• мой кот – my (male) cat → кот is masculine
• моя собака – my dog → собака is feminine
• моё окно – my window → окно is neuter

That’s why you say моя собака here.

Why is собака in this form? What case is it?

Собака here is in the nominative singular form.

Nominative is used for the subject of the sentence — the thing that performs the action.

• Моя собака (subject)
• любит (verb)
• убегать в парк (infinitive phrase, what she likes to do)

So собака answers the question кто? (who?) → собака – nominative.

What tense and form is любит, and how is it formed?

Любит is: