I go to school every morning.

Я каждое утро иду в школу.

(Present simple)

I am currently studying at school.

В данный момент я учусь в школе.

(Present continuous)

I didn't do my biology homework yesterday.

Вчера я не выполнила домашнее задание по биологии.

(Past simple)

Yesterday at 6:30 I was already at school.

Вчера в 6:30 я уже был в школе.

(Past continuous)