Questions & Answers about Мам, где тряпка? Я пролил воду!
Why is the word Мама shortened to Мам here?
This is the colloquial truncated vocative. In casual spoken Russian, nouns ending in -а or -я (mostly short names and family terms) drop their final vowel when you use them to address someone directly. You will also hear forms like пап (dad), тёть (aunt), or Саш (Sasha).
Can I use Мам as the subject of a sentence, like 'Мам здесь'?
No, you can only use this truncated form for direct address (calling out to someone). It isn't a replacement for the nominative case, so you must still say Мама здесь (Mom is here).
Why use the perfective verb пролил instead of the imperfective проливал?
The perfective пролил is used here because the focus is on the concrete result of a completed action that is highly relevant to the present moment. The water is currently on the floor, creating an immediate need for the rag (тряпка).
I often struggle with past tense stress. Where does the stress fall on пролил?
For masculine verbs of pouring or spilling, the stress typically shifts to the prefix, so it is pronounced прОлил. However, be careful if a female speaker says this: in the feminine form, the stress jumps to the very end of the word (пролилА).