"ayer estaba cansado luego de las clases" but is not the only way that you can say it
Well, I can show you how to say it in Spanish, since I don’t speak Thai. Yesterday: Ayer.
Llovió ayer
Le encontré ayer
Ayer fue martes*. (*in spanish, days and months are not capitalized)
Voy a empezar las clases..... is how you say i will begin class in spanish
"Tuve que trabajar ayer."
'Clase de tenis' is tennis class in Spanish.
"She showered yesterday" in Spanish is "Se duchó ayer". It is pronounced "say doo-CHO ah-YARE". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
Clase.
Yo tome ayer esta foto
to say how well you are doing in a class (example below): i am doing good in my spanish class - hago bueno en mi clase española
En el salón hay (The class where I am)