-ing endings

Question

what is the ending for a verb (present tense - infinitive) to change it to -ing. Like practice, practicar (to practice) to practicing?

Answer 1

1st conjugation verbs (ar) - ando

2nd & 3rd conjugation verbs (er, ir) - iendo

The thing that you attach these endings to are referred to as a verb stem.

practicar - practicando

Answer 2

link

explains some of the difference in the use of these words in Spanish and English.

Answer 3

MellamoDonna:

See lorenzo's answer which is what I would have said.