Mi padre usa el alicate cuando la tuerca está suelta.

Mi padre is the normal, everyday way to say my father in Spanish.

Spanish usually puts short possessive words like mi, tu, su, nuestro before the noun:

• mi padre = my father
• tu casa = your house
• su coche = his/her car

Padre mío is grammatical, but it sounds much more emphatic, literary, emotional, or old-fashioned in most contexts. In a simple statement like this one, mi padre is the natural choice.

Usa is the present simple form of usar and is often used in Spanish for things that happen regularly, typically, or as a general fact.

So:

• Mi padre usa el alicate cuando la tuerca está suelta
  = My father uses the pliers when the nut is loose

This sounds like a general habit or a typical situation.

If you said está usando, that would usually mean he is using it right now:

• Mi padre está usando el alicate = My father is using the pliers right now.

Spanish uses articles (el, la, los, las, un, una...) more often than English.

Here, el alicate means something like:

• the pliers
• the tool
• that tool he uses

Even when English might say just uses pliers, Spanish often prefers an article with a concrete noun.

Compare:

• Usa el alicate = He uses the pliers / the pair of pliers
• Usa un alicate = He uses a pair of pliers / a plier-like tool

So el makes the noun sound definite or identifiable in context.

This is a very common learner question.

In English, pliers is normally plural. In Spanish, alicate can be treated as a singular noun, even though it refers to a tool with two joined parts.

So Spanish may say:

• el alicate = the pliers / the pair of pliers
• los alicates = the pliers

In real usage, alicates is also very common, especially when people think of the tool as a pair. But your sentence uses el alicate, which is also acceptable.

So the main point is: do not assume Spanish must match English number here.

Because tuerca is a feminine singular noun in Spanish.

That means it takes:

• la in the singular
• las in the plural

Examples:

• la tuerca = the nut
• las tuercas = the nuts

You simply need to learn the gender of the noun with the word. Here, tuerca is feminine.

Spanish often uses estar for states or conditions, especially temporary ones.

Here, la tuerca está suelta means the nut is loose at that moment or in that situation. That is a condition, so estar is the natural choice.

• estar suelto/a = to be loose
• ser would usually suggest a more inherent or defining characteristic, which does not fit well here

So:

• La tuerca está suelta = The nut is loose
  is correct and natural.

Because suelta is an adjective agreeing with tuerca, which is feminine singular.

In Spanish, adjectives often change form to match the noun in:

• gender: masculine/feminine
• number: singular/plural

So you get:

• el tornillo está suelto = the screw is loose
• la tuerca está suelta = the nut is loose
• los tornillos están sueltos = the screws are loose
• las tuercas están sueltas = the nuts are loose

This is standard adjective agreement.

Here, suelta means loose, not firmly tightened.

The adjective suelto / suelta can have several meanings depending on context, such as:

• loose
• free
• separate
• unattached

But in a mechanical sentence with tuerca, the meaning is clearly loose.

So la tuerca está suelta means the nut is not tight enough.

Because Spanish uses the present tense after cuando when talking about a habitual action or a general condition.

This sentence describes what happens in that kind of situation:

• Mi padre usa el alicate cuando la tuerca está suelta

It means something like:

• Whenever the nut is loose, my father uses the pliers.

This is not talking about one specific past event, so the present tense is the natural choice.

Yes, but the meaning changes slightly.

• cuando la tuerca está suelta = when the nut is loose
  This suggests a repeated or expected situation.

• si la tuerca está suelta = if the nut is loose
  This sounds more conditional: in the case that the nut is loose.

In your sentence, cuando sounds more like a regular pattern or habit, so it fits very well.

Yes, Spanish word order is flexible, but this is the most neutral and natural order:

• subject + verb + object

So:

• Mi padre = subject
• usa = verb
• el alicate = object

You could change the order for emphasis, for example:

• Cuando la tuerca está suelta, mi padre usa el alicate.

This is also completely natural. It just puts the condition first.

Not in this exact sentence, because mi padre gives the important information about who does the action.

But Spanish often omits subject pronouns like yo, tú, él, because the verb ending already shows the person:

• Uso el alicate = I use the pliers
• Usa el alicate = He/she uses the pliers

However, a full noun like mi padre is used when you want to identify the person clearly. If you removed it here, you would just have:

• Usa el alicate cuando la tuerca está suelta

That would mean He/She uses the pliers when the nut is loose, but the listener would need context to know who he/she is.

Not necessarily. Alicate is a valid word for this kind of hand tool, but tool vocabulary can vary by region and by the exact type of pliers.

In Spain, alicates is very common for pliers. Depending on the tool, you might also hear more specific names for different types.

So el alicate is fine, but in real life someone might also use another term if they want to be more precise about the tool.