The teacher has explained this rule tours. General question: Has the teacher explained this rule tours? Special question: What has the teacher explained? Subject question: Who has explained this rule tours? Alternative question: Has the teacher or the lecturer explained this rule tours? Distinctive question: The teacher has explained this rule tours, hasn't he/she?
General question:
Has the teacher explained this rule tours?
Special question:
What has the teacher explained?
Subject question:
Who has explained this rule tours?
Alternative question:
Has the teacher or the lecturer explained this rule tours?
Distinctive question:
The teacher has explained this rule tours, hasn't he/she?