My questions has relation with the use "to" before of verbs when is neccesary used "to"
For example in this sentence: I'm looking for people who are interested to learn spanish, the use of "to" is good or wrong?

thanks

Question

My questions has relation with the use "to" before of verbs when is neccesary used "to"
For example in this sentence: I'm looking for people who are interested  to learn spanish, the use of "to" is good or wrong?

thanks

Answer

Your sentence is easily understandable, but as Warren mentioned, "interested in learning Spanish" is what would more usually be said.

There are many resources online to help you decide whether the "to+verb" form or the "verb+ing" form is correct. This is one that might help you: http://www.ego4u.com/en/cram-up/grammar/infinitive-gerund

You can also use Google to search "gerund or infinitive" to find other resources. Good luck with your studies!

Answer

It would be normally be said as I am looking for people who are interested in learning Spanish. You could also say I would be interested to know if anyone wants to learn Spanish.- which means I want to know what interest others have to learn Spanish, not who wants to learn.