Work in pairs. To be a good sales representative, you have to explain the operation process and answer some technical questions. Continue with the video to explain how to operate a photocopier. Go to learn about a real photocopier if you don't have a clear idea of how it works. You can refer to the following expressions.

For the salesperson

To explain the order in which certain things are done:

First of all ...
The next thing you have to do is ...
And then ...
Finally ...

To add a further point:

Make sure to ...
Oh, by the way, don't forget to ...
Be careful not to ...

To check that the other person is following you and has understood what you said:

OK, so is that clear?
Does that seem to make sense?
So there we are. Do you have any questions?

For the customer

If you want to ask the salesperson to explain something to you:

Excuse me, could you show me how to ...?
I wonder if you could tell me how this works.

If you haven't understood the explanation, or if you can't follow the instructions:

I'm sorry. I didn't quite follow you there.
I'm sorry. What did you say about the name of that part?