This is a grammar book for beginning to low-intermediate students of English. There are 116 units in the book, and each unit is about a different point of English grammar. There is a list of units at the beginning of the book (Contents).
Do not study all the units in order from beginning to end. It is better to choose the units that you need to do. For example, if you have a problem with the present perfect (I have been, he has done, etc.), study Units 16-21.








