Learn Hardcore French: Marie porte un pull confortable quand il fait frais. - Marie wears a comfortable sweater when it is chilly.

In French, the noun pull (sweater) is masculine. Therefore, you use the masculine indefinite article un rather than une. Noun gender must always be observed when pairing with articles.

What does the verb porte mean in this sentence?

The verb porte is the third person singular form of porter, which means “to wear.” In this context, it indicates that Marie wears a sweater.

How should I interpret the phrase “quand il fait frais”?

The phrase “quand il fait frais” is a common way in French to describe weather conditions. “Il fait frais” translates to “it is cool.” The construction uses the impersonal verb faire for describing the weather.

Does the adjective confortable change form depending on the noun it describes?

No, the adjective confortable remains the same in the masculine singular form, which matches the noun pull. French adjectives sometimes change with gender and number, but confortable is spelled the same for both masculine and feminine in the singular.

Could another word be used instead of “quand”? What is its function here?

Yes, you could use “lorsque” in place of “quand” if you wish, as both mean “when.” In this sentence, “quand” introduces the subordinate clause that explains the condition (i.e., “when it is cool”) under which Marie wears her sweater.

Is any specific punctuation required between the main clause and “quand il fait frais”?

Generally, French does not require a comma before the subordinate clause introduced by “quand” if the meaning is clear. Though in more complex sentences a comma might be used for clarity, in this case, no comma is necessary.