I'm sorry I'm late; I've been to ... I'm afraid I've left my book at home.
Could I leave ten minutes earlier (at twenty to ...)?
Could I have another copy? Have you got an extra sheet?
Shall I turn the lights out?
II. Beginning of Lesson
Let me introduce myself, I'll be teaching you English this year.
It's time to start now, / We can get down to (some) work.
I'll just mark the register. Who is missing (away, not here today) ?
Try not to be late next time.
I'm waiting to start.
III. End of Lesson
There's the buzzer (bell). / We'll have to stop here.
Right. You can put your things away and go.
How are we doing for time?
There are still three minutes to go.
We still have a couple of minutes left.
Hang on a moment/just hold on a minute.
One more thing before you go.
Revise what you did today and then try exercise 5.
Do the rest of the exercise as your homework for tomorrow.
There will be a test on this next Tuesday (in the near future).
