watashi wa apuri de kaigi no jikan o kaeraremasu.

topic particle

Breakdown of watashi wa apuri de kaigi no jikan o kaeraremasu.

• 私わたし: I
• を: direct object particle
• の: possessive case particle

Questions & Answers about watashi wa apuri de kaigi no jikan o kaeraremasu.

Why is は used after 私?

は marks the topic of the sentence.
So 私は means something like as for me or speaking of me.

In this sentence, 私は sets up who the sentence is about:

• 私は = as for me / I
• アプリで会議の時間を変えられます = can change the meeting time using the app

In natural Japanese, 私 is often omitted if it is already clear from context. So a native speaker might simply say:

• アプリで会議の時間を変えられます。

That can still mean I can change the meeting time in the app, depending on the situation.

What does アプリで mean here?

Here, で marks the means or tool used to do something.

So:

• アプリ = app
• アプリで = with the app, using the app, or in the app

In this sentence, it means the app is the method/tool used to change the time.

This is the same で you see in sentences like:

• ペンで書きます。 = I write with a pen.
• 日本語で話します。 = I speak in Japanese.

So アプリで does not mean at the app. It means by using the app.