Cette opération est trop dangereuse.

Breakdown of Cette opération est trop dangereuse.

être
to be
dangereux
dangerous
trop
too, too much
l'opération
the operation (f)

Questions & Answers about Cette opération est trop dangereuse.

Since the lesson is about nominalization, how does the word "opération" relate to a verbal clause here?
The word opération is the noun form of the verb opérer (to operate). Instead of using a verbal phrase like Opérer est trop dangereux (Operating is too dangerous), we use the noun phrase Cette opération to make the sentence sound more concise and formal, which is the main goal of nominalization.
Is there a reliable rule for turning verbs into nouns ending in "-ation" like in this sentence?
Yes, many French verbs ending in -er can be transformed into nouns by adding the suffix -ation, which often mirrors English. For example, opérer becomes opération, préparer becomes préparation, and informer becomes information. Nouns formed with this suffix are almost always feminine.
How does nominalization affect the adjective "dangereuse" in this sentence?
When you use an infinitive verb as the subject, such as Opérer est dangereux, the adjective is always masculine singular. But when you nominalize the subject into Cette opération, the adjective must now agree with the new noun. Since opération is feminine, the adjective changes to the feminine dangereuse.
Why do we use "cette" here instead of "cet", given that "opération" starts with a vowel?
Learners often over-apply the vowel rule! The special demonstrative adjective cet is only used for masculine singular nouns starting with a vowel or mute h (like cet homme). Because opération is feminine, you simply use the standard feminine form cette, regardless of the starting letter.

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