asita tomodati ni kaigi no zikan wo tutaemasu.

A natural reading is:

Ashita tomodachi ni kaigi no jikan o tsutaemasu.

Word readings:

• 明日 → あした
• 友達 → ともだち
• 会議 → かいぎ
• 時間 → じかん
• 伝えます → つたえます

In normal Japanese writing, this sentence would usually appear without spaces:

明日友達に会議の時間を伝えます。

明日 is a time expression, and many common time words can appear without a particle.

So:

• 明日 伝えます
• 今日 行きます
• 来週 会います

are all normal.

You can sometimes see 明日に, but that usually sounds more specific or marked, and in a basic sentence like this, 明日 with no particle is the most natural choice.

The particle に marks the target or recipient of the action here.

With 伝える, the pattern is often:

someone に something を 伝える
= to convey/tell something to someone

So in this sentence:

• 友達に = to a friend
• 時間を = the time
• 伝えます = will tell / will convey

That is why 友達 takes に.

The particle を marks the direct object of the verb.

Here, the thing being conveyed is 会議の時間.

So:

• 会議の時間を伝えます means
• (I) will tell/convey the meeting time

A useful way to see it is:

• に = to whom
• を = what is being conveyed

の connects nouns. In this sentence, it links 会議 and 時間.

So:

• 会議 = meeting
• 時間 = time
• 会議の時間 = the meeting’s time / the time of the meeting / the meeting time

Here, の works a bit like of or an apostrophe s in English, depending on how you translate it naturally.

Japanese sentences typically place the verb at the end.

So even though English says something like:

I will tell my friend the meeting time tomorrow

Japanese often organizes it more like:

Tomorrow / to my friend / the meeting time / will tell

That is completely normal in Japanese. The particles show the role of each part, so the verb can wait until the end.

Yes, the subject is omitted.

Japanese often leaves out information that is clear from context. In a sentence like this, the speaker is very often understood to be I:

(I) will tell my friend the meeting time tomorrow.

But depending on context, it could also mean we will tell, he will tell, she will tell, and so on. Japanese does this a lot, so learners need to get used to subjects being unstated.

伝えます is the polite non-past form of the verb 伝える.

• Dictionary form: 伝える
• Polite form: 伝えます

The non-past form in Japanese can refer to:

• the future, as in this sentence
• habitual actions
• sometimes present/future depending on context

Here, because of 明日, it clearly refers to the future.

伝えます has the nuance of conveying information to someone.

So:

• 言います = say
• 伝えます = tell/convey/pass on

In this sentence, 伝えます sounds natural because the speaker is passing along information about the meeting time.

For example:

• 友達に会議の時間を言います is understandable
• 友達に会議の時間を伝えます sounds more natural if you mean inform my friend of the meeting time

Yes, Japanese word order is fairly flexible as long as the particles stay correct.

For example, these can all work:

• 明日友達に会議の時間を伝えます。
• 友達に明日会議の時間を伝えます。
• 会議の時間を明日友達に伝えます。

However, some orders sound more natural than others depending on emphasis and context. The version you were given is very natural and easy for learners.

By itself, 友達 can mean:

• friend
• friends

Japanese nouns usually do not change form for singular vs. plural the way English nouns do.

So this sentence could mean:

• I will tell my friend the meeting time tomorrow or
• I will tell my friends the meeting time tomorrow

Context tells you which one is intended.

The spaces are usually added for learners.

Normal Japanese writing does not normally use spaces between words like this. A native-style version is:

明日友達に会議の時間を伝えます。

Textbooks and beginner materials often insert spaces to help you see the parts of the sentence more clearly.