Breakdown of На столе лежал камень овальной формы.
стол
table / desk
камень
stone
на
on, at / by (transport) / to (a place) / to (in answer to)
лежать
to lie, be lying down
Questions & Answers about На столе лежал камень овальной формы.
Why do we say камень овальной формы in the Genitive instead of just using the adjective овальный камень?
This uses the Genitive of qualitative description. While you can completely naturally say овальный камень (an oval stone), adding a classifying noun like форма (shape) in the Genitive makes the description sound more formal, precise, or literary. It functions just like the English 'a stone of oval shape'.
Why is the verb лежал placed before the subject камень?
Russian uses word order to show focus, usually placing the newest or most important information at the very end of the sentence. Starting with На столе лежал... sets the scene, and ending with камень... reveals what was there. If the sentence were Камень лежал на столе, it would mean we already knew about the stone and are just answering where it was.
Why is the feminine Genitive ending for овальный spelled as -ой (овальной) and not -ей?
The adjective овальный has a hard stem. For feminine nouns in the Genitive case, hard-stem adjectives take the -ой ending. You only use -ей for soft-stem adjectives (like синей) or when spelling rules require it after certain hushing consonants (as in хорошей).
Since a stone cannot physically perform the action of lying down, why do we use лежал here?