Je laisse mon téléphone dans mon sac pendant la réunion.

Because in French, a possessive adjective goes before each noun it belongs to.

So French says:

• mon téléphone = my phone
• mon sac = my bag

You cannot usually say one mon and let it cover both nouns. French normally repeats it:

• Je prends mon téléphone et mon sac.

This is different from English, where repetition is sometimes optional.

Laisser often means to leave something somewhere.

So:

• Je laisse mon téléphone dans mon sac = I leave my phone in my bag

This suggests you are putting it there or keeping it there and not taking it out.

By contrast:

• garder = to keep
• Je garde mon téléphone dans mon sac would sound more like I keep my phone in my bag

Both can sometimes work depending on context, but laisser is very natural when talking about leaving an object in a place.

Because laisse is the present-tense form of laisser for je.

The infinitive is:

• laisser = to leave

In the present tense:

• je laisse = I leave
• tu laisses
• il/elle/on laisse
• nous laissons
• vous laissez
• ils/elles laissent

So Je laisse is the correct finite verb form here.

Also:

• laisser = infinitive, not conjugated
• laissé = past participle, used in compound tenses like j’ai laissé

Because dans means in/inside.

• dans mon sac = in my bag

That matches the idea that the phone is physically inside the bag.

Other prepositions would change the meaning:

• sur mon sac = on my bag
• à mon sac is not natural here

So dans is the correct preposition for something located inside a container.

Pendant means during.

So:

• pendant la réunion = during the meeting

It expresses the time period when the action or situation happens.

In this sentence, it means that throughout the meeting, the phone stays in the bag.

This is a very common structure:

• pendant le cours = during class
• pendant le film = during the movie
• pendant la nuit = during the night

Yes. Durant can also mean during, and in many contexts it is very similar to pendant.

So these are both possible:

• pendant la réunion
• durant la réunion

For many learners, pendant is the more common and more everyday choice, so it is often the safer default.

French often uses an article where English may or may not use one.

Here, la réunion means the meeting. It refers to the meeting in question, the one understood from context.

French generally needs a determiner before a singular countable noun, such as:

• le livre
• la voiture
• une réunion

So pendant réunion would be incorrect.

It can often cover both ideas, depending on context.

French present tense is broader than English present simple. Je laisse can mean:

• I leave
• I’m leaving
• sometimes I keep/leave in a general or current situation

In this sentence, the natural interpretation is something like:

• I leave my phone in my bag during the meeting
• or I’m leaving my phone in my bag during the meeting

Context tells you whether it is a habit, a rule, or what the speaker is doing now.

It could be either. The French sentence itself does not force one interpretation.

It can mean:

1. A habit / usual practice

   • I leave my phone in my bag during meetings.

2. A decision in a specific situation

   • I’m leaving my phone in my bag during the meeting.

If the speaker wants to make the habitual meaning clearer, they might say something like:

• D’habitude, je laisse mon téléphone dans mon sac pendant la réunion.

If they want to emphasize a future one-time action:

• Je vais laisser mon téléphone dans mon sac pendant la réunion.

Because French uses a possessive adjective instead of an article in that position.

• mon téléphone = my phone

You do not say:

• le mon téléphone ✘

In French, possessive adjectives like mon, ton, son, notre, votre, leur already function as the determiner.

So:

• mon téléphone
• mon sac

are complete noun phrases by themselves.

A simple approximate pronunciation is:

zhuh less mon tay-lay-fone dahn mon sack pahn-dahn la ray-yoo-nyon

A few useful points:

• Je sounds like zhuh
• laisse sounds like less
• dans has a nasal vowel; the n is not fully pronounced like in English
• pendant also has nasal vowels
• réunion is roughly ray-yoo-nyon

If spoken naturally, French rhythm links words smoothly together, so the whole sentence flows rather than sounding word-by-word.

Because téléphone is a masculine noun in French.

So you say:

• mon téléphone
• un téléphone
• le téléphone

You cannot always guess noun gender from the ending alone. Some endings give hints, but many nouns simply have to be learned with their article.

A good habit is to learn nouns as a pair:

• le téléphone
• le sac
• la réunion

That makes it easier to choose the right possessive and article later.

Yes, but the structure changes.

If you want to say I leave it in my bag during the meeting, you can say:

• Je le laisse dans mon sac pendant la réunion.

Here:

• le = it (referring to le téléphone)

Notice that the pronoun goes before the conjugated verb:

• Je laisse mon téléphone...
• Je le laisse...

That word order is very important in French.