Après une longue journée, je bâille souvent avant le dîner.

French often distinguishes between jour and journée:

• jour = the day as a unit of time, date, or calendar day
• journée = the day as a lived span of time, often with emphasis on how it feels or what happens during it

So une longue journée means a long day in the sense of a long, tiring day. That is the natural choice here.

Using un long jour would sound unusual in this context.

In French, most adjectives come after the noun, but some common adjectives often come before it. Long/longue is one of the adjectives that can often go before the noun.

So:

• une longue journée = the natural phrasing here

This is something learners often just need to get used to: adjective placement in French is not always the same as in English.

Because journée is a feminine singular noun.

That means its article and adjective must match:

• une = feminine singular a
• longue = feminine singular form of long

So the agreement is:

• une longue journée

Compare:

• un long jour for a masculine noun
• une longue journée for a feminine noun

French contracts je to j’ only before a word that begins with a vowel sound or a mute h:

• j’aime
• j’habite

But bâille begins with the consonant sound b, so there is no contraction:

• je bâille

The French present tense is commonly used for habitual actions, just like the English present simple.

So je bâille souvent means:

• I often yawn
• not just I am yawning right now

This sentence describes something that happens regularly.

In French, short adverbs like souvent often come after the conjugated verb.

So:

• je bâille souvent

is the normal word order.

English often puts often before the main verb (I often yawn), but French usually does not copy that order directly.

They are two different time markers:

• après = after
• avant = before

So:

• Après une longue journée = After a long day
• avant le dîner = before dinner

They frame the action in time: first the day has happened, and the yawning happens before dinner.

In French, meals are usually treated as nouns with an article:

• le petit-déjeuner
• le déjeuner
• le dîner

So before dinner is naturally:

• avant le dîner

This is one place where French often uses an article even when English does not.

They are close, but not exactly the same:

• avant le dîner = before dinner (before the meal)
• avant de dîner = before having dinner / before eating dinner

The first uses a noun (le dîner = dinner, the meal). The second uses de + infinitive (dîner = to have dinner).

Both can be correct, but the sentence you were given focuses on the meal as a time reference.

French often uses the definite article with meals and general activities where English may use no article.

So French says:

• avant le dîner
• pendant le déjeuner
• après le petit-déjeuner

Even though English usually just says before dinner, during lunch, and so on.

There are two different accents here:

• Après has è
• bâille has â

è usually shows an open e sound, somewhat like the e in bed.

â is a circumflex accent. In modern French, it does not always dramatically change pronunciation, but it is part of the correct spelling. It can also reflect older historical spelling.

So even if the meaning is already known, the accents are still important for writing the words correctly.

bâille is pronounced roughly like bye in English.

A simple approximation is:

• bâille ≈ bye

But remember that French pronunciation is never exactly the same as English. Still, that approximation is very helpful for this word.

The phrase Après une longue journée is an introductory time phrase.

A comma is commonly used after that kind of opening element to make the sentence easier to read:

• Après une longue journée, je bâille souvent avant le dîner.

In informal writing, some commas like this may be omitted, but using the comma here is perfectly natural and clear.

Yes. That is grammatically correct.

It slightly changes the focus:

• Je bâille souvent avant le dîner = the sentence focuses first on I yawn
• Souvent, je bâille avant le dîner = the sentence highlights often

Both are correct, but the original version is very natural and straightforward.

Not always. Dîner can be:

• a noun: le dîner = dinner
• a verb: dîner = to have dinner / to dine

In this sentence, it is clearly the noun because it is preceded by le:

• le dîner

So here it means dinner, not to dine.