goukaku no tame ni, mainiti sukosizutu hukusyuu wo tudukemasu.

合格のために means for the sake of passing or in order to pass.

• 合格 = passing, success on an exam
• ために = for the purpose of, for the sake of
• の links the noun 合格 to ため

Because 合格 is a noun, it needs の before ために.

Compare:

• 合格のために勉強します。 = I study in order to pass.
• 日本へ行くためにお金をためます。 = I save money in order to go to Japan.

In the second example, 行く is a verb, so there is no の.

In this sentence, ために marks purpose.

So:

• 合格のために = for the purpose of passing

You will often see ために after a noun or dictionary-form verb when the meaning is in order to or for.

Examples:

• 健康のために運動します。 = I exercise for my health.
• 日本語を勉強するために辞書を買いました。 = I bought a dictionary in order to study Japanese.

Just ため by itself is possible in other structures, but ために is the standard form here.

少しずつ means little by little, bit by bit, or a little at a time.

It emphasizes small amounts done gradually.

So:

• 毎日少しずつ復習を続けます。 = I will keep reviewing a little every day.

It suggests a steady habit rather than doing a huge amount at once.

A useful comparison:

• 少し = a little
• 少しずつ = little by little / in small increments

Because 復習 is the direct object of 続けます in this sentence.

• 復習 = review, revision
• を marks what is being done/continued
• 続けます = continue

So the structure is:

• 復習を続けます = continue review / keep reviewing

Even though English might say I keep reviewing, Japanese often uses the noun 復習 plus する-type behavior or another verb like 続ける.

Because 続けます adds the idea of continuing or keeping up the habit.

Compare:

• 復習します。 = I review.
• 復習を続けます。 = I continue reviewing / I keep reviewing.

The second one emphasizes ongoing effort over time, which matches 毎日 and 少しずつ very well.

So the sentence is not just about reviewing once. It is about making review a regular continued action.

続けます is the polite non-past form of 続ける.

It can mean:

• I continue
• I will continue
• sometimes a general/habitual action, depending on context

In this sentence, it most naturally means something like:

• I will continue reviewing a little every day
• or I continue to review a little every day

Because Japanese non-past can cover both present habitual and future meaning, context decides which feels most natural.

Yes, but the difference is small.

• 復習を続けます = continue the act of review / keep up review
• 復習し続けます = continue reviewing, with stronger focus on the action itself

Both are natural.
復習を続けます sounds very straightforward and common.
復習し続けます can sound a bit more emphatic about uninterrupted continuation.

For many learners, it is enough to know that both can mean keep reviewing, but the sentence you were given is very natural.

Because Japanese often omits the subject when it is clear from context.

So:

• 合格のために、毎日少しずつ復習を続けます。

can naturally mean:

• I will continue reviewing a little every day in order to pass.

Japanese avoids repeating obvious information. If the speaker is talking about their own plans or habits, 私 is usually unnecessary.

If you added it, the sentence would still be grammatical:

• 私は、合格のために、毎日少しずつ復習を続けます。

But it is often less natural unless you want contrast or emphasis.

Japanese word order is flexible, as long as the particles make the roles clear.

The sentence is:

• 合格のために、毎日少しずつ復習を続けます。

This order is natural because it goes:

1. purpose = 合格のために
2. time/frequency = 毎日
3. manner/amount = 少しずつ
4. object = 復習を
5. verb = 続けます

You could move some parts around:

• 毎日、合格のために少しずつ復習を続けます。
• 少しずつ毎日復習を続けます。 (less natural than the original, but understandable)

The most important rule is that the verb usually comes at the end.

No, 毎日 usually does not need に.

Words like these often work as time expressions by themselves:

• 今日 = today
• 明日 = tomorrow
• 毎日 = every day
• 毎週 = every week

So:

• 毎日勉強します。 = I study every day.

You generally do not say 毎日に here.

Yes. ために can also express cause/reason in some sentences, but here it clearly means purpose.

For example:

• 病気のために学校を休みました。 = I was absent from school because of illness.
  Here, ために means because of.

But in your sentence:

• 合格のために、毎日少しずつ復習を続けます。

the meaning is clearly in order to pass, so it is a purpose use.

Usually, yes. 合格 commonly means passing an exam, test, interview, or selection process.

Examples:

• 試験に合格する = to pass an exam
• 大学に合格する = to get accepted to / pass admission for a university

In this sentence, a learner would naturally understand 合格 as passing the exam or succeeding on the test.

The sentence sounds like a deliberate study plan or resolution.

It gives these ideas together:

• goal: 合格
• purpose: のために
• regularity: 毎日
• manageable amount: 少しずつ
• persistence: 続けます

So the overall feeling is:

• I’m going to keep reviewing a little every day so that I can pass.

It suggests discipline and consistency rather than cramming all at once.