אפשר לאלף כלב.

Here, אפשר means it is possible or more naturally in English, you can / one can.

Hebrew often uses אפשר in an impersonal way, without saying who the subject is. So:

• אפשר לאלף כלב = It is possible to train a dog
• In more natural English: You can train a dog

Depending on context, אפשר can sometimes also mean it is allowed, but in this sentence it is most naturally understood as it is possible.

Because אפשר often creates an impersonal sentence.

English usually wants a subject, even a dummy one like it:

• It is possible to train a dog

Hebrew does not need that here. So instead of saying something like it is possible, Hebrew can simply say:

• אפשר = possible / it is possible

That makes the whole sentence feel general:

• אפשר לאלף כלב = One can train a dog / It’s possible to train a dog

Because after אפשר, Hebrew commonly uses an infinitive to say what is possible.

So the structure is:

• אפשר + infinitive

Examples:

• אפשר ללכת = It is possible to go
• אפשר ללמוד = It is possible to study
• אפשר לאלף כלב = It is possible to train a dog

So לאלף means to train / to tame, not trains or trained.

לאלף means to train, to tame, or to teach discipline to, depending on context.

With animals, it often means:

• to train
• to tame

So with כלב:

• לאלף כלב = to train a dog

This verb is especially common for training animals, but it can sometimes be used more broadly depending on context.

It is pronounced roughly le-a-LEF.

A more careful transliteration is:

• le'alef

The beginning ל here is the preposition to, attached to the infinitive form of the verb.

So:

• לאלף = to train

A learner may want to notice that it is not one smooth English-like syllable at the start; there is a break:

• le-a-lef

Because את is used before a definite direct object, and כלב here is indefinite.

Compare:

• אפשר לאלף כלב = It is possible to train a dog
• אפשר לאלף את הכלב = It is possible to train the dog

So:

• כלב = a dog
• הכלב = the dog
• את appears with הכלב, not with כלב

That is why את is not used in your sentence.

Hebrew usually has no separate word for a/an.

So:

• כלב can mean dog or a dog
• הכלב means the dog

In this sentence, because כלב has no ה־ (the) and no other marker making it definite, it is understood as a dog.

This sentence uses a very natural Hebrew pattern:

• אפשר + infinitive + object

So:

• אפשר = possible
• לאלף = to train
• כלב = a dog

Putting it together:

• אפשר לאלף כלב

This is a normal, neutral way to say it.

You might also hear other word orders in different contexts, especially for emphasis, but this one is straightforward and standard.

Grammatically, it is closer to it is possible.

But in natural translation, it often comes out as can.

So this sentence could be understood as:

• It is possible to train a dog
• You can train a dog
• One can train a dog

The best English version depends on context and style, but the Hebrew itself is built around the idea of possibility.

Potentially yes, because אפשר can sometimes express permission, not just ability or possibility.

For example:

• אפשר להיכנס? = May I come in? / Is it allowed to enter?

But in אפשר לאלף כלב, the most likely meaning is simply:

• it is possible to train a dog

If the context were about rules, then a permission reading might be possible, but without context, possibility is the default interpretation.

It is the infinitive of the verb אילף, which belongs to the pi'el binyan.

That matters because pi'el verbs often have a pattern associated with more active or intensive actions, though you should not rely on that meaning alone.

Useful related forms are:

• אילף = he trained
• אילפה = she trained
• לאלף = to train

So if you are studying verb patterns, this is a good example of a pi'el infinitive.

Yes, this is a natural and understandable sentence.

In everyday speech, people might also choose other ways to express a similar idea, depending on what exactly they mean:

• אפשר לאלף כלב = It is possible to train a dog
• אפשר לאלף את הכלב הזה = It is possible to train this dog
• אפשר לאלף כלבים = Dogs can be trained / It is possible to train dogs

So your sentence is normal Hebrew, especially as a general statement.