* "Be going to", which is used to express future plans or intentions. For example:
* "I am going to go to the store later."
* "She is going to study for her exam."
* "Be doing", which is used to describe an ongoing action. For example:
* "I am doing my homework."
* "They are doing well in their studies."
* "Be done", which is used to indicate that something is finished or completed. For example:
* "The work is done."
* "I am done with my chores."
If you could provide more context about where you heard or read "Be do," I might be able to give you a more specific answer.