Breakdown of C'est un romancier doué, ce dont je suis sûr.
je
I
être
to be
un
a / an (masculine)
c'est
it is, that is
sûr
sure
ce dont
what / that which (of which)
le romancier
the novelist
doué
gifted
Questions & Answers about C'est un romancier doué, ce dont je suis sûr.
Why do we use C'est un romancier doué instead of Il est romancier?
Why is dont used here instead of que for the word "which"?
The choice of relative pronoun depends on the verb that follows it. The French expression is être sûr de (to be sure of). Because the verb requires the preposition de, we must use dont to mean "of which."
What is the purpose of the word ce in ce dont?
Here, "which" refers to the entire preceding idea (the fact that he is a gifted novelist), not just a single noun. When a relative pronoun refers back to a whole clause rather than a specific word, French requires the neutral pronoun ce as an anchor. Together, ce dont translates to "that of which" or "a fact of which."
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