You are learning English, but still some elements of grammar are not clear to you?
You need to refresh your knowledge?
Have you decided to do it yourself?
In any case, this is your book!
AVAILABLE - the whole grammar, explained in simple words.
PRACTICAL - an immediate connection between the theory and its application in colloquial language through numerous examples, dialogues and exercises.
COMPREHENSIVE - all the grammar rules you need to speak well and write correctly.