wǒ yíhuìr gěi nǐ dǎ diànhuà.

This is because of a very common tone change rule for 一.

• 一 is normally first tone: yī
• But when it comes before a fourth-tone syllable, it changes to second tone: yí
• 会 in 会儿 is fourth tone: huì
• So 一会儿 is pronounced yíhuìr

This is called tone sandhi.

A few quick examples:

• 一个 → yí ge
• 一天 → yì tiān because 天 is first tone, not fourth
• 一起 → yìqǐ

So in this sentence, yíhuìr is exactly what you should expect.

Here, 一会儿 means in a little while, soon, or later in a moment.

In this sentence, it tells you when the action will happen.

So the structure is basically:

• 我 = I
• 一会儿 = in a little while
• 给你打电话 = call you

A useful thing to know is that 一会儿 can have more than one meaning depending on context:

1. in a little while / soon

   • like in this sentence

2. for a little while / for a moment

   • for example: 等一会儿 = wait a moment

So learners often see 一会儿 and wonder which meaning it has. The context tells you.

Yes, 一会儿 can move, and Chinese time words are often flexible.

In your sentence:

• 我一会儿给你打电话。

This is very natural.

But you can also say:

• 一会儿我给你打电话。

That is also natural. It puts a little more focus on the time.

A helpful rule is:

• Time words usually come before the main verb
• They often come:
  • after the subject, or
  • at the very beginning of the sentence

So these are both fine:

• 我今天去。
• 今天我去。

Likewise:

• 我一会儿给你打电话。
• 一会儿我给你打电话。

In this sentence, 给 does not mean give in the literal sense. Here it introduces the recipient or target of the action, similar to to in English.

So:

• 给你打电话 = make a phone call to you / call you

You can think of the pattern as:

• 给 + person + verb

Examples:

• 给你写信 = write a letter to you
• 给他发消息 = send him a message
• 给妈妈买东西 = buy things for mom

So in this sentence, 给你 marks you as the person receiving the phone call.

This is one of those very common verb-object expressions that you just learn as a set phrase.

• 打电话 = make a phone call / call
• literally, yes, 打 often means hit
• but in many common expressions, 打 has extended meanings

Examples:

• 打电话 = call
• 打字 = type
• 打球 = play ball
• 打伞 = open/use an umbrella

So although the literal meaning may seem strange at first, 打电话 is simply the normal way to say to make a phone call.

It is best to learn 打电话 as one chunk.

Both patterns exist, but 给你打电话 is very common and natural.

Two possible patterns are:

• 给你打电话
• 打电话给你

Both can mean call you.

However, 给你打电话 is often the more basic pattern learners meet first.

You can think of it this way:

• 给你打电话 = call you
• 打电话给你 = make a phone call to you

In everyday speech, both are understandable and natural, though 给你打电话 is extremely common.

In standard Mandarin, yes, 一会儿 is commonly pronounced with 儿化:

• yíhuìr

That final -r sound comes from 儿.

A few pronunciation tips:

• Don’t say it like two fully separate words: yí huì ér
• In standard speech it is more like one smooth unit: yíhuìr
• The r coloring is light, not overly strong

That said, pronunciation varies by region:

• In Mainland standard Mandarin, 一会儿 with the -r is very common
• In Taiwan Mandarin, people may more often say 一會 or use other expressions like 等一下 or 待會

So for standard Mainland Mandarin, yíhuìr is the safest pronunciation to learn.

There is no special future marker in this sentence, and that is completely normal in Chinese.

Chinese often uses:

• time words
• context
• situation

to show whether something is in the past, present, or future.

Here, 一会儿 already tells you the action will happen soon, so the sentence is clearly about the future.

So Chinese does not need a word like will here.

Compare:

• 我明天去。 = I’m going tomorrow.
• 我一会儿给你打电话。 = I’ll call you in a little while.

If needed, you could add words like 会 or 要, but you often do not need them.

Sometimes yes, if the context is clear.

Chinese often drops pronouns when everyone already knows who is being talked about.

For example:

• 一会儿给你打电话。
  = I’ll call you in a little while.
  The subject 我 is omitted because it is understood.

Or if the listener is obvious from context, sometimes even 你 might be omitted in a conversation, though in this sentence 给你 is usually kept because it sounds clearer and more complete.

So:

• 我一会儿给你打电话。 = full and clear
• 一会儿给你打电话。 = also very natural in conversation

Yes, it is very natural.

我一会儿给你打电话。 is a normal, everyday sentence.

A few equally natural variations are:

• 一会儿我给你打电话。
• 我待会儿给你打电话。
• 我等会儿给你打电话。

These all mean roughly the same thing, with small differences in style or regional preference.

You may also hear:

• 我一会儿给你打个电话。

The 个 here makes the action sound a little more conversational and natural, as in give you a quick call.

A simple way to break it down is:

• 我 = subject
• 一会儿 = time expression
• 给你 = recipient/target
• 打电话 = verb-object phrase

So the overall pattern is:

• Subject + Time + 给 + Person + Verb-Object

In this sentence:

• 我 + 一会儿 + 给你 + 打电话

This is a very useful pattern to remember, because you can build many similar sentences with it:

• 我明天给你发消息。
• 他晚上给妈妈做饭。
• 我们以后给老师写信。

So this sentence is a good model for a lot of everyday Chinese.