A free program for Android, by ishwa inc..
This app is a comprehensive English grammar book for learners of English.
The lessons are organized by topic and are accompanied by an extensive set of questions. Each question is composed of a title, a sentence, and an answer. The answer is usually presented in the form of a sentence.
The app is intended to be used as a learning tool. The user can review each lesson and each question.
The app includes a comprehensive list of topics and sub-topics. Each subtopic is composed of a number of lessons and questions.
The user can access the app from any device and can study at any time of the day.
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