honki nara, mainiti nihongo wo benkyousita hou ga ii desu.

なら is a conditional that often means if it is the case that..., if..., or if you're saying....

So:

• 本気 = serious / serious intention
• 本気なら = if you're serious

Here, 本気 is a noun, and なら attaches naturally to nouns.

This pattern is very common:

• 学生なら = if you are a student
• 日本に行くなら = if you’re going to Japan
• 安いなら = if it’s cheap

In this sentence, 本気なら means something like if you really mean it or if you’re serious about it.

本気 means seriousness, being serious, or real intention.

In this sentence, it does not just mean serious in a general personality sense. It means something more like:

• if you’re serious about learning Japanese
• if you truly mean it
• if you really want results

So the sentence implies that if the person genuinely wants to improve, then studying every day is a good idea.

This is one of the most common questions learners have.

The pattern:

• verb past casual + ほうがいい means
• it would be better to...
• you should...

So:

• 勉強したほうがいい = you’d better study / you should study

Even though した is past tense in form, this pattern is not actually talking about the past. It is a fixed grammar pattern used to give advice.

Compare:

• 行ったほうがいい = you should go
• 早く寝たほうがいい = you should go to bed early
• 毎日練習したほうがいい = you should practice every day

勉強するほうがいい is grammatically possible in some contexts, but it usually sounds more like comparing options in a more general way, such as studying is better. For direct advice, 勉強したほうがいい is the standard form.

By itself, ほう literally means something like side, direction, or way.

But in ～たほうがいい, it works as part of a set expression. You do not need to translate ほう literally every time.

A helpful way to think of it is:

• 勉強したほうがいい = the "doing study" option is better
• more natural English: you should study

So although ほう originally has the idea of side/option, the full pattern simply means it would be better to...

In ～ほうがいい, the が marks ほう as the thing being judged as good.

Very literally:

• 勉強したほう = the option of studying
• 勉強したほうがいい = the option of studying is good / better

In natural English, we usually do not translate it piece by piece. We just say:

• You should study
• It would be better to study

So the whole expression ～たほうがいい should be learned as one useful advice pattern.

日本語 is the object of 勉強する here, so it takes を.

• 日本語を勉強する = to study Japanese

This is very straightforward object marking:

• 本を読む = read a book
• 音楽を聞く = listen to music
• 日本語を勉強する = study Japanese

Even though in English we say study Japanese, Japanese still marks Japanese as the direct object with を.

Japanese often leaves out the subject when it is obvious from context.

So instead of saying:

• あなたが本気なら、あなたは毎日日本語を勉強したほうがいいです

Japanese usually just says:

• 本気なら、毎日日本語を勉強したほうがいいです。

The listener understands that the speaker is talking to you from context.

This is very natural in Japanese. Omitting obvious subjects is one of the most important features of the language.

～たほうがいいです gives advice, and it can range from mild to fairly strong depending on context and tone.

Here:

• 本気なら、毎日日本語を勉強したほうがいいです。

sounds like:

• If you’re serious, you should study Japanese every day.
• If you really mean it, it would be better to study Japanese every day.

It is stronger than a very soft suggestion, but usually softer than a direct command like:

• 毎日勉強しなさい。 = Study every day.

So this sentence sounds like firm advice, not an order.

This is normal.

In Japanese, many grammar patterns use a plain form before the final polite ending.

So:

• 勉強した = plain past form
• ほうがいいです = polite ending

This mixture is completely standard and natural.

You see this in many patterns:

• 行ったほうがいいです
• 食べないほうがいいです
• 雨が降ると思います
• 日本に行きたいです

The verb before the grammar pattern is often in plain form, while the sentence itself ends politely.

Yes. 毎日 is fairly flexible.

Your sentence has:

• 本気なら、毎日日本語を勉強したほうがいいです。

That is perfectly natural.

You may also see:

• 本気なら、日本語を毎日勉強したほうがいいです。

Both mean essentially the same thing: If you’re serious, you should study Japanese every day.

The first version is probably a little more straightforward and common for learners.

No. Normal Japanese writing usually does not use spaces between words.

So the natural written form is:

• 本気なら、毎日日本語を勉強したほうがいいです。

The spaced version is often used only in teaching materials to make the parts easier to see.

Yes. You may see:

• 勉強したほうがいい
• 勉強した方がいい

Both are correct.

In everyday writing, many people use ほう in hiragana in this grammar pattern because it is easier to read and feels more natural. So for learners, したほうがいい is often the most useful version to remember.

The negative advice pattern is:

• verb nai-form + ほうがいい

So:

• 勉強しないほうがいい = you shouldn’t study
• 毎日勉強しないほうがいい = you shouldn’t study every day

Examples:

• そんなに心配しないほうがいいです。 = You shouldn’t worry so much.
• 夜遅く食べないほうがいいです。 = You shouldn’t eat late at night.

So:

• したほうがいい = should do
• しないほうがいい = shouldn’t do

By itself, Japanese often leaves the subject unstated, so technically the sentence could refer to different people depending on context.

However, with:

• 本気なら = if you’re serious

it most naturally sounds like the speaker is addressing another person and giving them advice.

If you wanted to clearly say I should study Japanese every day, you might say:

• 本気なら、毎日日本語を勉強したほうがいい。

But in actual conversation, context would still decide whether it means I, you, or someone else. Japanese relies heavily on context.

Yes, but the difference is small in many situations.

• 本気なら = if you’re serious
• 本気だったら = if you were serious / if you’re serious

Both can work, but 本気なら is a little simpler and more direct as a condition based on the noun 本気.

本気だったら sounds slightly more like it comes from 本気だ, treating the whole predicate is serious as the base.

In many everyday cases, they are very close. For learners, it is enough to know that 本気なら is very natural here.

Yes, it is natural and correct.

It sounds like practical advice:

• If you’re serious, you should study Japanese every day.

A native speaker might also say similar versions such as:

• 本気なら、毎日日本語を勉強したほうがいいよ。
• 本気で日本語を上達したいなら、毎日勉強したほうがいいです。

But your sentence itself is already natural and useful.

A good way to break it down is:

• 本気なら = if you’re serious
• 毎日 = every day
• 日本語を = Japanese + object marker
• 勉強したほうがいいです = should study / it would be better to study

So the structure is:

• [condition] + [advice]

More abstractly:

• Noun + なら, Verb-past + ほうがいいです

This is a very useful pattern for giving advice based on a condition:

• 時間がないなら、タクシーで行ったほうがいいです。

  • If you don’t have time, you should go by taxi.

• 疲れているなら、今日は休んだほうがいいです。

  • If you’re tired, you should rest today.