As I was walking to school, I saw my homeroom teacher.
我走路上學時，看到了我的導師。
As it was raining, we stayed home and played board games.
因為在下雨，我們待在家玩桌遊。
Please do as the teacher says.
請照老師說的做。
As the bell rang, everyone rushed out of the classroom.
鐘聲一響，大家就衝出教室。