1. Grammar
Task 1
I compared 2 grammar books. Practical English Usage by Michael Swan &. English Grammar in Use by Raymond Murphy. English Grammar in Use by Raymond Murphy shows the basic rules of grammar with using of visual methods, and lots of exercises, which trains the users of this book. The book is intended for students of intermediate level.
In contrast to English Grammar in Use, Practical English Usage is theoretical material. It contains hundreds of grammar rules with examples, focus reader's attention on the most difficult points of English grammar for foreign learners and the most common mistakes. The book is intended for higher level students and for teachers.
They both are useful for studying language. I think that training is essential condition of success in learning, but good theory is on the basis of correct speech.
I would prefer Practical English Usage because it has helpful materials for studying and teaching, easy explanations of difficult grammar aspects, a great number of examples and “not to use examples”. It helps in all the forms of performance.