I´ve begun this course and have already encountered several problems. Here they are: “aðvara” is not “to warn.” The correct verb structure is “að vara við.” “Aðskilja” is not quite correct for the infinitive form of “to separate.” The correct form is “að aðskilja.” An interesting complication are the two Icelandic words given for “cancellation” — “afpöntun” and “aflýsing.” When taking the quizzes, there’s no way of knowing which is which. The author of this course should give a hint as to which word is intended.