Questions & Answers about Il libro è caduto sul pavimento.
Why do we use è (is) instead of ha (has) to say the book fell?
Why does caduto end in -o?
Where does the word sul come from?
Sul is a combined word (an articulated preposition) made by merging the preposition su (on) and the definite article il (the). We use il because pavimento is a masculine singular noun starting with a standard consonant.
Does pavimento mean 'pavement'?