Question 1

Why is tranchant masculine singular when la pierre is a feminine noun?

Accepted Answer

This is the core rule for making a generalization with c'est. Whenever you use the structure [Noun], c'est... to state a general fact or opinion about a category, the adjective that follows is always masculine singular, ignoring the noun's actual gender.

Question 2

Could I just say La pierre est souvent tranchante?

Accepted Answer

Yes, you can! That is grammatically correct and means the same thing, but it sounds a bit more formal. Using the [Noun], c'est [masculine adjective] structure is extremely common in everyday conversational French to express general truths.

Question 3

In English we just say "Stone is...", so why does French add the article La?

Accepted Answer

In French, definite articles (le, la, les) are mandatory when talking about general concepts, materials, or an entire class of things. While English drops the article to generalize, French requires it.

Question 4

Does tranchant mean a specific kind of "sharp"?

Accepted Answer

Yes, tranchant refers specifically to a sharp, cutting edge (like a blade or a broken rock). It comes from the verb trancher (to slice). If you were talking about something sharp because it has a pointy tip, like a needle or a pencil, you would use pointu instead.

La pierre, c'est souvent tranchant.

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