¿Cuál es la diferencia principal en las terminaciones entre los verbos -ar y los verbos -er en el presente?

Los verbos -er usan más 'e' en sus terminaciones en comparación con los verbos -ar.

Conjugating Regular Verbs In Spanish Lesson Plan for Grade 9th Grade

Name: Conjugating Regular Verbs in Spanish
Author: Insta~Lesson

Puedo conjugar verbos regulares en el presente en español.

1
Regular '-er' verbs in Spanish include verbs like 'beber' which means to drink, 'comer' which means to eat, and 'creer' which means to think or believe.
2
The present tense endings for regular '-er' verbs are '-o', '-es', '-e', '-emos', and '-en', similar to '-ar' verbs but with more e's.
3
When using two verbs together, like 'deber' (should), only the first verb is conjugated; the second verb remains in its infinitive form.