In order to singing this aria properly, the first thing to be taken into account is that the air emission has to be completely free. It is necessary to breath and take the vowel without trying to form it, without thinking about it.
Afterwards, they focus on French pronunciation, specially the French "e" vowel. It is important to place the vowels up and to sing very legato.
In a certain moment, Krause indicates the student not to prolong so much a note, and not to sing so slowly because the right tempo is faster.