Cambridge English Grammar

 Cambridge English Grammar in Use by Raymond Murphy. The first section on Past and present is free.            ( If you want to do other tenses in this app, you need to buy it.) Do the 5 exercises in Unit 6 (Past Continuous),   then write a paragraph of 8 lines to say:

• how useful this was for learning English and why
• how easy the app was to use 
• how interesting the app was 
• if you would use the app again

The 5 exercises in Unit 6 is easy for me and  I like this but i do not want  to use it again. I would like to learn something hard like a bit more challenge. However, this Unit  is  very useful for who are learning English for the beginners because it has lessons with explain and  exercises to do.