Breakdown of Мальчик вытащил игрушку из-за спины.
мальчик
boy
игрушка
toy
спина
back
из-за
because of; from behind
Questions & Answers about Мальчик вытащил игрушку из-за спины.
Doesn't из-за usually mean 'because of'?
It does! However, its original, literal meaning is 'from behind.' When talking about physical space and movement, из-за combined with the Genitive case describes motion originating from behind an object, like pulling a toy from behind a back (из-за спины).
Why is спина (back) in the form спины?
The compound preposition из-за always requires the Genitive case. Since спина is a feminine noun ending in -а, its Genitive form ends in -ы, making it спины.
Why is there no Russian word for 'his' before 'back'?
In Russian, when you talk about actions involving your own body parts, possessive pronouns like своей (one's own) or его (his) are usually left out because it is already obvious from the context.
How does the verb вытащил (pulled out) pair with the preposition here?
The prefix вы- on the verb вытащить means moving something 'out.' This pairs perfectly with prepositions starting with из- (like из-за or из-под), which also indicate motion coming 'out of' or 'from' a place.