What part of the verb was conjugated?

What part of the verb was conjugated?

By the conjugation we change the endings og the verb, e.g.:
работа-ть (the Infinitive)
Present:
Я работаЮ
ты работаЕШЬ
он работаЕТ
мы работаЕМ
вы работаЕТЕ
Они работаЮТ
Due to this pattern you can conjugate many other verbs: отдыхать, обедать, читать, гулять etc.
We have some irregular verbs but not so many like in English or German.
Following my course you can see the most of them, but gradually, not in a go.