Không chắc đúng đâu nha:
The yesterday's lesson is more interesting than this lesson.
Yesterday's lesson was less boring than this lesson.
This lesson is more boring than yesterday's lesson. \(\Rightarrow\) Yesterday's lesson is more interesting than this lesson.
Yesterday's lesson is more interesting than this one
This lesson is more boring than yesterday's lesson.
=> Today's lesson is less interesting than yesterday's.