Questions & Answers about Утром я пью кефир.
Why is утром in the instrumental case here if it means 'in the morning'?
In Russian, the instrumental case is often used with parts of the day or seasons to express when something happens. So, the noun утро (morning) becomes утром to mean 'in the morning.' You will see the same pattern with вечером (in the evening) or летом (in the summer).
The infinitive of the verb is пить (to drink). Why does the vowel disappear in пью?
The verb пить has an unpredictable stem change in the present tense. The root drops the vowel to become пь-, and then takes standard endings: я пью, ты пьёшь, он пьёт, and so on. The soft sign (ь) tells you to pronounce the consonant softly and creates a slight 'y' sound before the ending.
Is кефир in the nominative or accusative case in this sentence?
It is in the accusative case because it is the direct object of the verb (it is the thing being drunk). However, because кефир is a masculine inanimate noun (not a living person or animal), its accusative form is identical to its basic dictionary form.
Could I change the word order to Я пью кефир утром?
Yes, both are grammatically correct. Russian word order is flexible, but the beginning of the sentence usually sets the background context. Starting with Утром is a very natural way to describe a daily routine because it establishes the time frame before introducing the action.