This document contains exercises to practice different English grammar structures, including:
1. Correcting sentences with verbs in the present simple and present continuous tenses.
2. Rewriting sentences in the past simple tense.
3. Completing sentences with the present simple or present continuous forms of verbs.
4. Writing sentences using the present simple or present continuous tenses.
The document provides grammar exercises for students to review and practice various verb tenses and structures.