The Magdalena is the longest Amazonas is the biggest department
river in Colombia in Colombia
What is the longest river in the world?
What was the most enjoyable holiday you have ever had?
Longest and the most enjoyable are superlative forms.
The superlative form is EST or MOST... . In general, we use EST for short words and MOST ... for longer words.
Long - longest hot - hottest easy - easiest hard - hardest
most famous most boring most difficult most expensive
These adjectives are irregular:
good -- best bad -- worst far -- furthest
We normally use THE before a superlative (the longest / the most famous, etc...);
Yesterday was the hottest day of the year.
The film was really boring. It was the most boring film I have ever seen.
After superlatives we use IN with the places (towns, buildings, etc...)
Ex: What is the longest river in the world?
We normally use OF for a period of time.
Ex: What was the happiest day of your life?
We often use the present perfect ( I have done ) after a superlative
That was the most delicious meal I have had for a long time
Taken from English Grammar in Use
Taken from English Grammar in Use
