What is the difference between using "de" and "que" for the English word "to"?

Question

Here are two examples where `de` and `que` are meant to translate to `to` in English: `Donde tengo que dejar los documentos?` = Where do I have to leave the documents? `Es imposible de saber` = It is impossible to know. Both `que` and `de` mean `to` in these sentences. My question is what is the difference such that one must be used over the other?

Answer 1

please don't use goolge translate it will confuse you.

Donde tengo que dejar los documentos?

where do i have to leave the documents? que = what que dejar = to leave

es imposible de saber?

here de is to

de donde eres? here de is where are you from. de= from where or to where,to what

it all depends on the sentence

Answer 2

This gets more into idioms and usage than actual translation of the word "to." Look at "tango que" as simply meaning "have to" and "de saber" as the way way Spanish translates as "to know." Sometimes, you won't get a literal, word-for-word translation of something you're trying to figure out. Imagine trying to explain to a Spanish speaker what you mean when you say, "I was busted by my parents for chatting with my BFF so much. He's the goat!"

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