Ya no usamos magnesio líquido.

Ya no means no longer or not anymore.

So Ya no usamos magnesio líquido means that using liquid magnesium/chalk used to be true before, but it is not true now.

A useful pattern is:

• ya = already / now
• no = not
• ya no = not anymore / no longer

Examples:

• Ya no vivo allí. = I don’t live there anymore.
• Ya no tenemos tiempo. = We don’t have time anymore.

Usamos is the present indicative form of usar for nosotros/nosotras.

So it means:

• we use
• or in this negative sentence, we don’t use

The full conjugation of usar in the present is:

• yo uso
• tú usas
• él/ella/usted usa
• nosotros/nosotras usamos
• vosotros/vosotras usáis
• ellos/ellas/ustedes usan

In this sentence, usamos tells you the subject is we.

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

So:

• Ya no usamos magnesio líquido and
• Nosotros ya no usamos magnesio líquido

both mean the same thing.

Including nosotros would usually add emphasis, contrast, or clarity:

• Nosotros ya no usamos magnesio líquido, pero ellos sí. = We don’t use liquid magnesium/chalk anymore, but they do.

In standard Spanish, the negative word no normally goes before the verb.

So:

• no usamos = we do not use

When ya is added, it usually goes before no:

• ya no usamos = we no longer use

That order is very common and natural.

In Spanish, articles are often omitted when talking about a material, substance, or thing in a general sense.

So:

• usamos magnesio líquido = we use liquid magnesium/chalk
• no usamos magnesio líquido = we don’t use liquid magnesium/chalk

This is similar to English when we say:

• We use water
• We don’t use plastic

If you add an article, it can sound more specific:

• No usamos el magnesio líquido que compraste. = We aren’t using the liquid magnesium/chalk that you bought.

In Spanish, adjectives usually come after the noun.

So:

• magnesio líquido = liquid magnesium/chalk

This is the normal order:

• agua fría = cold water
• pan integral = wholemeal bread
• tiza líquida / magnesio líquido = liquid chalk

Putting the adjective before the noun is unusual here and would not sound natural.

Literally, magnesio líquido looks like liquid magnesium, but in real-life contexts it often refers to liquid chalk, especially in climbing, gymnastics, weightlifting, or gym settings.

So depending on context, the learner may see it translated more naturally as:

• liquid chalk

This is a good reminder that vocabulary may not always match word-for-word between Spanish and English.

Yes. It is still present tense.

The sentence describes the current situation:

• right now, we do not use it

The expression ya no adds the idea that this is different from before.

So the tense is present, but the phrase implies a contrast with the past.

Sometimes, yes.

The Spanish present tense can cover both:

• we use / we don’t use
• we are using / we aren’t using

However, with ya no, the most natural interpretation is usually:

• we don’t use it anymore
• we are no longer using it

Context decides whether it sounds more habitual or more immediate.

Yes, it is grammatically possible, but it is less neutral.

• Ya no usamos magnesio líquido is the normal, broad statement.
• Ya no estamos usando magnesio líquido sounds more like we are no longer using liquid chalk at the moment / these days, with stronger focus on the ongoing situation.

In many cases, Spanish prefers the simple present where English might use a progressive form.

Because the noun itself is already there:

• magnesio líquido

If you wanted to replace it with a pronoun, you could say:

• Ya no lo usamos. = We don’t use it anymore.

Here, lo stands for magnesio líquido.

Sometimes Spanish allows some movement for emphasis, but Ya no usamos magnesio líquido is the most natural and standard version.

Other orders may appear in speech or for emphasis, but learners should treat:

• ya no + verb

as the main pattern.

For example:

• Ya no comemos carne.
• Ya no trabajo allí.
• Ya no salimos tanto.

If you were talking to you all informally in Spain, you would use vosotros:

• Ya no usáis magnesio líquido.

Compare:

• usamos = we use
• usáis = you all use

Since the original sentence has usamos, it clearly means we.

No. The expression for not anymore is usually:

• ya no

If you say:

• no usamos más magnesio líquido

that can be understood in some varieties of Spanish, especially in Latin America, but for a learner of Spanish from Spain, ya no usamos magnesio líquido is the safer and more standard choice.

In Spain, ya no is the most natural structure to learn first.

It is neutral.

There is nothing especially formal or informal about:

• Ya no usamos magnesio líquido.

Its tone depends mostly on context. It could appear in:

• conversation
• a gym rule
• a workplace explanation
• a sports setting

It is a normal everyday sentence.