Present progressive exercise

to be (am, is, are) + infinitive + -ing

Examples past continuous:

I am reading a book.
They are going for a walk.

English Present progressive exercises

Present continuous  with free online exercises, Present continuous examples and sentences. Online exercises Present continuous,  questions and Present continuous negative sentences.

Online exercises English grammar and courses
Free tutorial Present continuous. English Present continuous exercises. English grammar easy to learn. Present continuous matching exercises, quizzes and riddles - English word order.