I got this idea from the In Company Teacher’s resource book (pre intermediate) which contains plenty of great Business English activities.
These following dialogues are split into two columns. In one column the English is somehow incorrect. Students read through the dialogue and decide for each line of dialogue which column contains correct English. The dialogue contains grammatical forms and vocabulary which can then be focused on in follow up activities, for example, a telephone roleplay.
- Calling to make an appointment (present continuous)