This is often the biggest hurdle in 6th grade. Remember:
If you made a mistake, look at the grammar rule in the back of the textbook to see why the correct answer is what it is. gdz po angliiskomu iazyku 6 afanasieeva
Using -er/-est for short words (big/bigger/biggest) and more/most for long words (beautiful/more beautiful). This is often the biggest hurdle in 6th grade
Understanding how to say "The book was written" instead of "He wrote the book." How to Use GDZ Effectively gdz po angliiskomu iazyku 6 afanasieeva