yàobúshì hétong xiě de hěn qīngchu, wǒ hái zhēn bú fàngxīn mǎshàng bǎ yājīn gěi tā.

要不是 means if it were not for... or if ... had not .... It often introduces a condition that prevented a bad result.

In this sentence, 要不是合同写得很清楚 means:

If the contract had not been written so clearly...

Compared with 如果不是, 要不是 is usually more conversational and often more emphatic. It commonly appears when the speaker wants to say that something negative would have happened otherwise.

This is because of a tone change rule for 不.

Normally, 不 is fourth tone: bù.
But when it comes before another fourth-tone syllable, it changes to second tone: bú.

So:

• 不 + 是 becomes búshì
• 不 + 放 becomes búfàng

This is a very common pronunciation rule in Mandarin.

Because 得 is used after a verb to introduce a complement describing how the action is done.

So:

• 写 = write
• 写得很清楚 = written very clearly

The pattern is:

verb + 得 + description

Examples:

• 说得很快 = speak very fast
• 看得很认真 = read/watch very carefully
• 写得很清楚 = write very clearly

So 得 is necessary here.

This is a very common Chinese pattern. The thing being talked about can appear as the topic or subject, even if it is not the actual doer of the action.

So 合同写得很清楚 does not mean the contract itself wrote something. It means:

• the contract is written clearly
• the wording of the contract is clear

English often uses a passive idea here, but Chinese does not always need a passive marker.

You can compare:

• 这本书写得很好 = This book is well written.
• 这封信写得很清楚 = This letter is written very clearly.

Here 清楚 most likely means the content or wording is clear, not the handwriting.

With a contract, 写得很清楚 usually means:

• the terms are clearly stated
• the details are easy to understand
• there is little room for misunderstanding

So it is more about clarity of meaning than neat penmanship.

In this sentence, 还 does not mean still.

The combination 还真 is an emphatic, conversational way to say something like:

• really
• actually
• indeed

So 我还真不放心 means something like:

• I really wouldn’t feel at ease
• I honestly wouldn’t be comfortable
• I actually would be pretty worried

It adds a natural spoken emphasis.

放心 means to feel at ease, to feel reassured, or to stop worrying about something.

So 不放心 means:

• not to feel comfortable about something
• not to feel reassured
• to still have doubts or worry

In this sentence, it means the speaker would not feel comfortable immediately handing over the deposit unless the contract were very clear.

把 is used when the speaker wants to highlight what happens to a specific object.

The pattern is:

把 + object + verb phrase

Here:

• 把押金给她
• literally: take the deposit and give it to her

The object 押金 is being affected by the action, because it is being transferred to her. That makes 把 very natural here.

Without 把, you could also say:

• 马上给她押金

But 把押金给她 makes the deposit itself more clearly the object being handled.

Here 给 is the main verb, meaning give.

So:

• 把押金给她 = give the deposit to her

In this phrase:

• 押金 = the thing being given
• 她 = the recipient

So 给她 here is part of the giving action, not just a prepositional phrase by itself.

Because 马上 is an adverb, and adverbs usually come before the verb phrase they modify.

Here 马上 modifies the whole action of giving her the deposit:

• 马上把押金给她 = give her the deposit immediately

That placement is very natural.

If you move it around, some versions may still be understandable, but this one sounds the most standard and smooth.

Not necessarily from grammar alone.

The sentence clearly tells us this:

• because the contract was written clearly, the speaker felt able or willing to give her the deposit right away

But it does not explicitly mark completion of the action.

So the meaning is closer to:

• Otherwise I really wouldn’t have felt comfortable giving her the deposit immediately

In context, it may strongly imply that the speaker did give it, or was ready to give it, but the sentence itself focuses more on the speaker’s level of comfort and trust than on the completed action.

Because in natural Mandarin, the second syllables of some words are often pronounced with a neutral tone.

So:

• 合同 is commonly pronounced hétong
• 清楚 is commonly pronounced qīngchu

This is normal and very common in everyday speech. Neutral tone often makes the word sound more natural and fluent.

A learner should recognize that not every syllable is stressed equally in real Mandarin pronunciation.

Not really in the same way.

The sentence is built around a conditional idea:

• 要不是...，我还真不放心...
• If it weren’t for..., I really wouldn’t feel comfortable...

Words like 让 and 使 mean make/cause, so they would create a different structure.

For example, you could say something like:

• 合同写得很清楚，让我比较放心。
• The contract is written clearly, which makes me feel more at ease.

That is grammatical, but it is a different sentence pattern and a slightly different emphasis. The original focuses on the condition that prevented hesitation.