Перед тем как печь пирог, лучше просеять муку через сито.

Перед тем как is a set expression meaning before, before doing something, or before the time when...

Why not just перед?

• перед by itself is a preposition, so it normally goes with a noun:
  • перед ужином = before dinner
• перед тем как introduces a whole clause or an infinitive phrase:
  • перед тем как печь пирог = before baking a pie / before you bake a pie

So here, because what follows is an action, not just a noun, перед тем как is the natural choice.

A close synonym is прежде чем:

• Прежде чем печь пирог, лучше просеять муку.

Both are correct, but перед тем как often feels a bit more conversational and literal.

In this sentence, перед тем как is treated as one whole conjunction, so it is written without an internal comma:

• Перед тем как печь пирог, ...

The comma appears after пирог because the subordinate clause comes first, and then the main clause begins:

• Перед тем как печь пирог, лучше просеять муку через сито.

You may also sometimes see:

• Перед тем, как печь пирог, ...

That version is also possible, but the sentence you were given uses the unsplit conjunction, which is very common in neutral modern Russian.

Here печь is an infinitive because Russian often uses the infinitive after expressions like перед тем как when the subject is general, obvious, or not stated directly.

So:

• перед тем как печь пирог

literally works like:

• before baking a pie
• before you bake a pie

Russian does not need to say you here. This kind of infinitive structure is very common in instructions, recipes, and general advice.

A fuller version with a finite verb is also possible, for example:

• Перед тем как вы будете печь пирог, лучше просеять муку.

But that sounds less compact and less natural for a general instruction.

Печь is the imperfective verb to bake. It is used here because the sentence refers to the activity in a general way:

• before baking a pie
• before you start baking a pie

The imperfective is very common when talking about a process, a general action, or the idea of doing something.

The perfective partner is испечь. That would focus more on the action as a completed whole. In some contexts, испечь could also be possible, but here печь sounds more natural because the sentence is about preparation for the activity.

So the contrast is roughly:

• печь пирог = to bake a pie, as an activity/process
• испечь пирог = to bake a pie completely, to finish baking it

Просеять is perfective, and that makes sense here because the sentence recommends one complete preparatory action:

• sift the flour, and get that done before you start baking

Perfective verbs often express:

• a single completed action
• a result
• doing something once from start to finish

That fits recipe language very well. The idea is not be sifting flour in general, but sift it now, completely.

If you used the imperfective просеивать, it would sound more like:

• a habitual action
• a repeated process
• an ongoing activity

So лучше просеять is basically it’s better to sift it first and have that finished.

Лучше + infinitive is a very common Russian pattern meaning:

• it is better to...
• you’d better...

So:

• лучше просеять муку = it’s better to sift the flour

Russian does not need a dummy subject like English it. The sentence is impersonal.

If you want to say who this advice is for, you can add a dative pronoun:

• Вам лучше просеять муку. = You’d better sift the flour.
• Нам лучше просеять муку. = We’d better sift the flour.

Without that, the advice is general.

Both are direct objects, so they are in the accusative case.

1. печь пирог

   • пирог is masculine singular and inanimate
   • for masculine inanimate nouns, accusative = nominative
   • so it stays пирог

2. просеять муку

   • мука is feminine singular
   • the accusative singular changes to муку

So:

• мука → муку
• пирог → пирог

This is a very common pattern in Russian case endings.

Через means through, and it takes the accusative case.

So:

• через сито = through a sieve

This is the standard way to say sift through a sieve in Russian:

• просеять муку через сито

Why accusative?

• через always governs accusative
• сито is neuter singular
• its nominative and accusative forms are the same: сито

So even though the form does not change, it is still accusative here.

A learner might wonder about с ситом, but that would mean something more like with a sieve, not through a sieve. Russian normally says через сито for this action.

Here it is the verb печь = to bake.

Russian also has the noun печь, which means stove or oven, so the spelling is the same. The difference comes from grammar and context.

In this sentence:

• как печь пирог

the word печь is followed by пирог, which makes it clearly an infinitive verb meaning to bake.

If it were the noun, the structure would be different. For example:

• Русская печь = a Russian stove
• печь в доме = the stove in the house

So context tells you which one it is.

Russian often prefers infinitives in general instructions, advice, and recipe language because they are short and natural.

Compare:

• Перед тем как печь пирог, лучше просеять муку.
• Перед тем как вы будете печь пирог, лучше просеять муку.

Both are understandable, but the infinitive version is:

• more compact
• more general
• more typical of instructions

English does something similar with phrases like:

• Before baking a pie, sift the flour
• Before you bake a pie, sift the flour

Russian uses the infinitive especially often in this kind of context.

Yes. Russian word order is flexible, and the sentence can be rearranged depending on emphasis.

The given version:

• Перед тем как печь пирог, лучше просеять муку через сито.

puts the before baking part first, so it frames the advice by time.

You could also say:

• Лучше просеять муку через сито перед тем как печь пирог.

That still works, but it sounds a bit different in focus. The original sentence feels especially natural for instructions because it starts with the preparatory time phrase.

So the meaning stays basically the same, but the emphasis shifts.

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

That means:

• печь пирог can mean bake a pie or bake the pie
• просеять муку can mean sift flour or sift the flour

Context tells you which meaning is intended.

In recipe-style instructions, this is completely normal. Russian relies on context, not articles, to show whether something is specific or general.