Dibujo el boceto con un lápiz.

In Spanish, the subject pronoun is often left out because the verb ending already shows who is doing the action.

• dibujo = I draw / I am drawing

The -o ending tells you it is first person singular (I), so yo is not necessary.

You could say Yo dibujo el boceto con un lápiz, but it usually sounds more natural to omit yo unless you want emphasis or contrast:

• Yo dibujo, no él. = I’m the one drawing, not him.

Here, dibujo is the verb form of dibujar.

• dibujar = to draw
• dibujo = I draw / I am drawing

So in this sentence, dibujo is a present tense verb.

Be careful: dibujo can also be a noun meaning drawing, but that would usually appear with an article:

• el dibujo = the drawing

In Dibujo el boceto..., it is clearly the verb.

It can often be understood as either, depending on context.

• Dibujo el boceto con un lápiz. can mean:
  • I draw the sketch with a pencil.
  • I am drawing the sketch with a pencil.

Spanish uses the simple present more broadly than English does. If you specifically want to emphasize that the action is happening right now, Spanish can also use:

• Estoy dibujando el boceto con un lápiz. = I am drawing the sketch with a pencil.

But the original sentence is completely normal.

Spanish usually uses an article where English sometimes does too, and sometimes does not.

• el boceto = the sketch

This suggests a specific sketch, one that is known from the context.

If you said Dibujo un boceto con un lápiz, that would mean:

• I draw a sketch with a pencil

So the difference is:

• el boceto = a specific, known sketch
• un boceto = any sketch / a sketch

Un lápiz means a pencil, so it refers to one pencil, but not a specific one.

• con un lápiz = with a pencil

If you said con el lápiz, that would mean with the pencil, referring to a particular pencil already known in the conversation.

So:

• un lápiz = a pencil
• el lápiz = the pencil

Con means with.

In this sentence, it shows the instrument used to do the action:

• Dibujo el boceto con un lápiz.
• I draw the sketch with a pencil.

It tells you how the sketch is being drawn.

Other examples:

• Escribo con un bolígrafo. = I write with a pen.
• Corto el papel con tijeras. = I cut the paper with scissors.

Yes, Spanish word order is often more flexible than English word order.

The basic order here is:

• Dibujo el boceto con un lápiz.

But you could also say:

• Con un lápiz dibujo el boceto.

This puts more emphasis on con un lápiz.

You could even hear:

• El boceto lo dibujo con un lápiz.

That structure emphasizes el boceto.

Still, the original sentence is the most straightforward and neutral version.

They are related, but they are not exactly the same.

• boceto = sketch, usually something rough or preliminary
• dibujo = drawing, a more general word

So el boceto suggests a sketch or draft, not necessarily a finished artwork.

For example:

• Hago un boceto primero. = I make a sketch first.
• Luego hago el dibujo final. = Then I make the final drawing.

The accent mark shows where the stress goes:

• lápiz → stress on the lá

Without getting too technical, the written accent tells you that the word is pronounced differently from what the default spelling rules would suggest.

So you pronounce it roughly like:

• LAH-pees

The plural is:

• lápices = pencils

A simple Latin American-style pronunciation guide would be:

• dee-BOO-ho el bo-SE-to kon oon LAH-pees

A few notes:

• j in dibujo sounds like a strong English h
• b and v in Spanish are softer than in English
• con un often flows together in normal speech

So it may sound something like:

• dee-BOO-ho el bo-SE-to ко-noon LAH-pees

Yes. That is also correct, but it changes the emphasis slightly.

• Dibujo el boceto con un lápiz = I draw / I’m drawing the sketch with a pencil
• Estoy dibujando el boceto con un lápiz = I am drawing the sketch with a pencil

The estar + gerund form focuses more clearly on an action in progress right now.

In many everyday situations, Spanish prefers the simple present more than English does, so the original sentence is very natural.