Answer:
The infinitive, the gerund and the participle are the three non-personal forms of verbs.
All infinitives end up in ar, er, go and lack a person:
Love, laugh, read ...
We make the gerunds by adding the ending -ndo to the infinitive
Examples:
love → loving
sew → sew
live → living
write → writing
With the gerund we indicate that an action is in development:
The newspaper director is writing.
The wording is watching.
I am eating now.
We use the participle to indicate that an action has concluded:
The race is over
I have finished reading the book.
Juan is gone