Oxford Online English
How to Use To Be in English - Using Be in English Grammar Lesson
To be: In this English grammar lesson you can learn about the most important verb. You'll see how to use to be in English. You’ll learn how to use be in simple sentences and questions. You can learn how to make negatives and short forms...
Englishing
Expressions with BE (about to, due to, on the verge to, etc)
There are millions of expressions with the verb to be. Although, there are few that can be used for a future intention. In this lesson Mr. P./Marc explains those expressions that can be used when you are talking about a future intention....