Tu dois lire le rapport parce que c'est un problème difficile.

From Lesson 55:Obligation (devoir)·French

Questions & Answers about Tu dois lire le rapport parce que c'est un problème difficile.

Why do we say tu dois lire instead of conjugating both verbs?
When you use devoir (must / to have to) with another verb, only devoir is conjugated to match the subject (tu dois). The second verb stays in its dictionary form, called the infinitive (lire). This is similar to English: we say "You must read", not "You must reads".
Is problème masculine even though it ends in "-e"?
Yes! While many French words ending in "-e" are feminine, problème is a very common exception. You can see it is masculine in this sentence because it uses the masculine word for "a": un problème.
Why does difficile come after problème?
In French, most adjectives come after the noun they describe, which is the opposite of English. So "a difficult problem" becomes un problème difficile. Only a small group of common adjectives (like petit or bon) go before the noun.
Why do we use c'est instead of il est for "it is"?
In French, you must use c'est (instead of il est) when "it is" is followed by a noun that has an article like un, une, le, or la in front of it. Because we are saying "it is a problem" (c'est un problème), we have to use c'est.

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