Breakdown of Ce que j'ai vu, c'est une métamorphose en l'espace d'une semaine.
je
I
une
a / an (feminine)
avoir
to have
voir
to see
la semaine
the week
c'est
it is, that is
ce que
what (object)
en l'espace de
within the space of
la métamorphose
the metamorphosis
Questions & Answers about Ce que j'ai vu, c'est une métamorphose en l'espace d'une semaine.
Why use the phrase en l'espace de instead of just saying en une semaine?
Could I say dans l'espace de since dans also means 'in'?
No, en l'espace de is a fixed idiomatic expression for time. Even though dans is often used for physical spaces or future timeframes, this specific phrase for duration always requires en.
Why is there a comma and c'est in the middle? Couldn't we just say Ce que j'ai vu est une métamorphose?
While omitting c'est is sometimes done in formal writing, it sounds unnatural in everyday French. When you start a sentence with a phrase like Ce que... or Ce qui... (meaning 'What...'), it is standard to 'resume' the subject with a comma and c'est. It gives the sentence a natural rhythm and adds emphasis to what follows.
As a quick refresher, why does this sentence start with Ce que and not Ce qui?
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