Today in class, a student told me this. Great explanation of the tones. There is nothing like seeing things from a child's perspective.
1st ā: like singing
2nd á: question tone
3rd ǎ: as complaining
4th à: angry
Hoy me pasó esto un alumno. Genial la explicación de los tonos. No hay nada como ver las cosas desde la perspectiva de un niño.
1º ā: cantadito
2º á: tono de pregunta
3º ǎ: como si te estuvieras quejando
4º à: enfadado, sonido cortado de golpe
Some more tricks on tones
1st tone: Visiting a dentist, you say "Ah~~" to let him see your mouth.
2nd tone: The same as when someone expresses surprise by saying "What?"
3rd tone: Like saying "Really?" slowing down.
4th tone: the angry tone, think of you saying "No!" in a firm way.