Do you trip all single R's
in "enfermero" i was told I could trip the first r but not the second r. The second r was errr like english. Is this correct. Are there really three r's Tripped trilled and errrr'
I am not sure why you are using "trip" here, but Mark's description is quite accurate: the single R is a single tap of the tongue (must be what you call "tripped"), and the thrilled one (the hard one to pronounce) has several vibrations (typically between 2 and 4, but it can have more if you maintain it longer). In "enfermero" they are all pronounced as single.
If by "trip" you mean "roll", then no, none of the r's in enfermero are tripped.
A single spanish 'r' is more of a single "tap" of the tip of the tongue to the alveolar region or the roof of the mouth (the ridge right behind the upper teeth). It is similar to a 'tt' in English as in 'better'. A single 'r' at the beginning of a word is rolled.
The reason an 'r' after an l or n is somewhat rolled, is because the tip of the tongue is already in that position, so a roll facilitates the pronunciation.
There is never a spanish 'r' that sounds like an English 'r'.
Sorry if i am misinterpreting what you mean by trip.
Okay, I looked up the rule and it says r are always tripped except
after n or l
or at the being of a word where it would be trilled
so please confirm enfermero is all tripped