1. Superlatives the + adjective + est (short adj.)
the most + adjective (long adj.)
The least + adjective (long adj.)

2. Himmy is the fattest cat in the world.
Fat cats
Himmy is the fattest cat in the world.

3. Harrods
Harrods is the most expensive department store in London.

4. Burj Khalifa
Burj Khalifa is the tallest building in the world.

5. Sports and Fitness
Football is the most popular and watchable sport game in the world.

6. Figure skating
Figure skating is the most beautiful sport to watch.

7. Who looks the fittest? The teen boy
doesn’t look
fit at all.
He looks grossly overweight.
He looks obese.
The woman with the ball looks reasonably fit.
The woman in the gym looks very fit.
The woman in the gym looks the fittest of all.

8. Dangerous sports
Sky Diving, High Wave Surfing and Mountain Climbing are the most adventurous and dangerous sports.

9. Healthy food
Fruit and vegetables are the healthiest and (the) most important ingredients of a balanced diet.

10. Bad habits
Smoking, binge drinking and taking drugs are the worst and (the) most addictive habits.

11. Lifestyles
A Couch Potato lifestyle is the unhealthiest and (the) most harmful for our health.
Active Living is the healthiest way of life.