Después giro un tornillo con el destornillador, pero el otro no entra bien.

Because Spanish often drops subject pronouns when the verb ending already makes the subject clear.

• giro = I turn / I rotate
• The -o ending tells you it is yo

So Después giro... naturally means Then I turn... or Afterwards I turn...

You could say Yo giro..., but that would usually add emphasis, contrast, or clarity.

Giro is the 1st person singular present tense of girar.

So literally it means:

• I turn
• I rotate

In this context, it refers to turning the screw with a screwdriver. Depending on the situation, English might translate it more naturally as I turn a screw, I tighten a screw, or I screw one in.

Después means afterwards, later, or then.

At the beginning of the sentence, it helps show sequence:

• first something happens
• después, this happens next

So it is organizing the actions in order.

You will often see it at the start of a sentence in instructions or descriptions of a process.

Un tornillo means a screw — not a specific one already identified.

Spanish uses:

• un / una for a / an
• el / la for the

So giro un tornillo introduces a screw. If the speaker meant a particular, already known screw, they might say giro el tornillo instead.

Literally, con el destornillador means with the screwdriver.

Spanish uses con to show the instrument or tool used to do something:

• escribo con un bolígrafo = I write with a pen
• corto con un cuchillo = I cut with a knife

So here:

• con = with
• el destornillador = the screwdriver

This is a very common question.

In Spanish, destornillador is the normal word for screwdriver, even though it looks like it comes from the idea of unscrewing.

So Spanish uses destornillador for the tool in general, whether you are:

• tightening a screw
• loosening a screw
• removing a screw

It is just the standard everyday word for screwdriver.

El otro means the other one.

In this sentence, it stands for the other screw. Spanish often leaves out a noun if it is already understood from context.

So:

• el otro = the other one
• more fully: el otro tornillo

This is very natural in Spanish.

Because el otro means the other one, usually referring to the remaining one in a known set or contrast.

Compare:

• otro = another one
• el otro = the other one

Here the speaker seems to be contrasting one screw with another:

• one screw is being turned
• the other one does not go in properly

So el otro is the natural choice.

Literally, it means it doesn’t enter well.

But in natural English, for a screw, it usually means something like:

• it doesn’t go in properly
• it doesn’t fit in well
• it won’t go in smoothly

Spanish often uses entrar for things that physically go into a space, hole, slot, opening, etc.

So with a screw, no entra bien suggests that the screw is not going into the hole or thread correctly.

Yes, entrar basically means to enter or to go in, but Spanish uses it in many everyday situations where English might use different verbs.

For example:

• La llave no entra. = The key won’t go in.
• El cable no entra bien. = The cable doesn’t fit/go in properly.
• El tornillo no entra bien. = The screw doesn’t go in properly.

So this is a very normal use of entrar in Spanish.

Bien means well, but in this kind of sentence it often means properly, smoothly, or correctly.

So:

• entra bien = goes in properly / fits properly
• no entra bien = doesn’t go in properly

It is not about being morally good or nice; it is about the action happening in the right way.

Yes. It is in the present tense:

• giro
• entra

Spanish often uses the present tense to describe:

• what someone is doing right now
• a routine
• instructions
• a live description of steps in a process

So Después giro un tornillo... can sound like someone is describing what they do step by step: Then I turn a screw...

Yes. A comma after Después is possible, especially when it is being used as an introductory adverb.

So both are possible:

• Después giro un tornillo...
• Después, giro un tornillo...

The meaning does not really change. The comma just gives a slightly clearer pause in writing.

Yes, absolutely.

• pero el otro no entra bien
• pero el otro tornillo no entra bien

Both are correct.

The shorter version is more natural when the noun is already obvious from context. Spanish often avoids repeating nouns when they are easy to understand.