" para garantizar que si you percibo en cambio es un cambio del cafe."
My instructor told me that once you conjugate a verb in a sentence, you use the infinitive after that. In this sentence on LoMasTv, " para garantizar que si you percibo en cambio es un cambio del cafe," Why is "percibo" used rather than "percibir?"
3 Answers
" para garantizar que si yo percibo en cambio es un cambio del cafe," Why is "percibo" used rather than "percibir?"
In order to guarantee that
That introduces the clause "if I notice a change..." I is the subject of this clause and needs a conjugated verb to follow.
...yo percibo un cambio...
...I perceive a change...
Your instructor was referring to cases where the two verbs are in the same clause without a change of subject.
Quiero jugar al tenis.
I want to play tennis.
I hope that this helps.
... 
you only use the infinitive if the next verb is immediately after the first one, such as in "quiero bailar" (i want to dance). In this case, however, the sentence is trying to say "i perceive," so you conjugate it as "yo percibo." Just because there's an verb before it doesn't mean every verb after is infinitive - you basically only do that when you want it to say "to ___ ." Hope that makes sense!
Your instructor has over-generalized. Besides what Delores said, there are many uses of gerunds and participles, not infinitives, in sentences after conjugated verbs.
