tolkienlanguages1-5  Exercise 2: Verb Forms
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  lorin             I sleep
  lóran             I am sleeping
  tíralyë           you are watching
  samis             he or she has
  orcor matir aiwi  orcs eat birds

lorin vs lóran: lorin is the aorist (timeless or habitual: "I sleep"); lóran
is the present (happening now: "I am sleeping"), made by lengthening the
vowel and adding -a.

The person is shown by the ending: -n (I), -lyë (you), -s (he or she). In
the last example, -r on matir marks a plural subject.