You're late.The teacher_____(begin)his class already

You're late.The teacher_____(begin)his class already
You're late.The teacher_____(begin)his class already

You're late.The teacher_____(begin)his class already
has begun

has begun
already 表示：已经，还，与现在完成时连用。
祝你学习进步，更上一层楼！(*^__^*)

空格填：had began

has begun

has begun