Если бы вы были внимательнее на про

Если бы вы были внимательнее на прошлом уроке, вы бы сейчас лучше знали материал.

Results (English) 1:

If you were closer to the previous lesson, you'd better know the material.

Results (English) 2:

If you were closer to the last lesson, you would now know better material.

Results (English) 3:

If you were looking at the last lesson, you would now be better known material.