Мы подготовили сюрприз.

Подготовили is the past tense plural form of the verb подготовить.

Breakdown:

• подготовить = to prepare / to get ready
• подготовили = prepared

The ending -ли shows that the subject is plural, which matches мы (we).

Compare:

• я подготовил / подготовила = I prepared
• ты подготовил / подготовила = you prepared
• мы подготовили = we prepared

In the past tense, Russian verbs agree with the subject in gender (for singular) and number.

Russian normally does not use an auxiliary verb like have to form the past tense.

So English:

• We prepared a surprise
• We have prepared a surprise

can both often be expressed in Russian simply as:

• Мы подготовили сюрприз.

Russian uses:

• the past tense form of the verb
• and often aspect to show whether the action is completed or ongoing

Here, подготовили already carries the idea of a completed action, so it works well for we prepared or we have prepared, depending on context.

This is a very common question because it involves aspect.

• подготовили is from подготовить — perfective
• готовили is from готовить — imperfective

In simple terms:

• perfective = the action is seen as completed
• imperfective = the action is seen as in progress, repeated, or just described without focusing on completion

So:

• Мы подготовили сюрприз. = We prepared / have prepared a surprise.
  The surprise is ready; the action is completed.

• Мы готовили сюрприз. = We were preparing a surprise / We used to prepare a surprise.
  This focuses more on the process, not necessarily the finished result.

It is in the accusative, but for inanimate masculine nouns, the accusative singular is often the same as the nominative singular.

So:

• nominative: сюрприз
• accusative: сюрприз

Because сюрприз is:

• masculine
• singular
• inanimate

the form stays the same.

Compare with a feminine noun:

• Мы подготовили книгу.
  Here книга changes to книгу in the accusative.

A noun like сюрприз is masculine because it ends in a consonant in its dictionary form.

This is a very common pattern in Russian:

• nouns ending in a consonant are often masculine
• nouns ending in -а / -я are often feminine
• nouns ending in -о / -е are often neuter

So:

• сюрприз → masculine
• книга → feminine
• окно → neuter

Of course, there are exceptions, but this rule works very often.

The stress is:

• Мы
• подгото́вили
• сюрпри́з

So the sentence is pronounced approximately: My pad-ga-TO-vi-li syur-PRIZ

A more careful breakdown:

• подгото́вили → stress on то́
• сюрпри́з → stress on the last syllable

Stress is important in Russian because it is not always predictable and can affect pronunciation a lot.

A natural approximate pronunciation for English speakers is:

mɨ pət-gʌ-TO-vee-lee syur-PREES

A few notes:

• Мы has a vowel sound that is not exactly English ee or i. It is the Russian ы sound.
• In normal speech, some unstressed vowels are reduced.
• Final voiced consonants are often devoiced, so сюрприз may sound a bit like syur-prees at the end.

If you want a learner-friendly approximation: mwi pud-ga-TO-vi-li syur-PRIZ

Not perfect, but useful as a starting point.

Yes. Russian word order is more flexible than English because the grammar endings carry a lot of information.

The neutral order here is:

• Мы подготовили сюрприз.

But you could also hear:

• Сюрприз мы подготовили.
• Подготовили мы сюрприз.

These alternatives change the emphasis, not the basic meaning.

For example:

• Мы подготовили сюрприз. = neutral statement
• Сюрприз мы подготовили. = emphasizes the surprise
• Подготовили мы сюрприз. = may emphasize the fact that it was prepared

For beginners, it is best to learn the neutral order first.

Russian can sometimes omit the subject when it is clear from context, but in the past tense it is often more useful to include it.

So you can say:

• Мы подготовили сюрприз.

And in the right context, you might also hear:

• Подготовили сюрприз.

However, unlike some languages, Russian past tense forms do not always clearly show the person by themselves.
For example, подготовили could mean:

• we prepared
• you (plural/formal) prepared
• they prepared

So including мы makes it clear that the subject is we.

Usually yes, in this sentence it is a very close match.

Сюрприз means:

• surprise
• something unexpected prepared for someone

So:

• Мы подготовили сюрприз. = We prepared a surprise.

It is a borrowed word and is used very naturally in Russian.

Russian has no articles, so there is no direct equivalent of a, an, or the.

That means:

• сюрприз can mean a surprise or the surprise

Which one is meant depends on context.

So:

• Мы подготовили сюрприз. could mean:
  • We prepared a surprise.
  • We prepared the surprise.

In many learning examples, it is translated as a surprise, because that sounds most natural out of context.

Yes, that is a reasonable way to understand it.

The verb подготовить often means:

• to prepare
• to make ready
• to get ready

So depending on context, Мы подготовили сюрприз could suggest:

• we created the surprise
• we arranged the surprise
• we got the surprise ready

The exact nuance depends on what kind of surprise it is.

Then the verb would change because Russian past tense agrees with the speaker’s gender in the singular.

• Я подготовил сюрприз. = a male speaker: I prepared a surprise
• Я подготовила сюрприз. = a female speaker: I prepared a surprise

But with мы (we), there is just the plural form:

• Мы подготовили сюрприз.

You would normally use the imperfective verb:

• Мы готовили сюрприз.

This focuses on the process:

• We were preparing a surprise
• We prepared a surprise (in the sense of doing the activity, not necessarily finishing it)

So the contrast is:

• Мы подготовили сюрприз. = completed result
• Мы готовили сюрприз. = process / ongoing action / repeated action

You put не before the verb:

• Мы не подготовили сюрприз.

That means:

• We did not prepare a surprise
• We haven’t prepared a surprise

If you want to stress that it still is not ready, this form works very naturally because подготовить is perfective and focuses on the completed result not happening.