Question 1

How does de funcionar mean "if the lathe works"? Where is the word for "if"?

Accepted Answer

The preposition de followed by an infinitive is a special way to form a conditional "if" clause. It means the exact same thing as si funciona (if it works). This structure is a bit more formal or literary than using si, but it is very useful for concise writing.

Question 2

Why is the subject el torno placed after the verb funcionar?

Accepted Answer

When you use an infinitive to form a standalone clause like this, the subject of that infinitive almost always comes directly after it. Saying de el torno funcionar would sound very awkward and unnatural in Spanish.

Question 3

Does de funcionar tell us how likely the lathe is to work?

Accepted Answer

No, the de + infinitive structure is neutral on its own! To know if it is a likely scenario or a hypothetical one, you have to look at the main clause. Because the main clause uses the future tense (terminarán), this is a real, possible condition: "If it works, you will finish." If the main clause used the conditional (terminarían), it would mean "If it worked, you would finish."

Question 4

Is it common to use de + infinitive like this in everyday conversation?

Accepted Answer

It is understood, but it sounds quite formal. In casual, everyday speech, people will almost always just say si funciona bien el torno. You will mostly encounter this de + infinitive structure in literature, journalism, or formal workplace instructions.

De funcionar bien el torno, ustedes terminarán las piezas.

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