To fill in the blanks with the right form of the adjective in brackets, let's examine each sentence:
Your bag's zip is easier to close than mine.
- Explanation: When comparing two things using the comparative form of adjectives, we use "easier" for "easy."
My mother's advice is always useful.
- Explanation: The given sentence is already complete with the correct form of the adjective "useful."
This summer is hotter (hot) than ever.
- Explanation: When comparing the current summer to previous summers, we use "hotter."
It is the most difficult rule of all.
- Explanation: When comparing three or more items, we use the superlative form of the adjective "difficult," which is "the most difficult."
This pen writes better than my previous one.
- Explanation: The correct comparative form of "good" is "better" when comparing two objects.
This athlete is stronger than his competitor.
- Explanation: To compare the strength of two individuals, we use the comparative form "stronger."
This pupil is the cleverest in the class.
- Explanation: When comparing all pupils in the class and stating that one of them is the most clever, we use the superlative form "the cleverest."
This is the oldest castle in Britain.
- Explanation: To indicate that something is the oldest among similar objects, we use the superlative form "the oldest."
Health is more important than money.
- Explanation: When comparing the importance of health and money, we use the comparative form "more important."
This path is narrower than the parallel one.
- Explanation: The correct comparative form of "narrow" is "narrower" when comparing two paths.
This actor is the most famous actor in Spain.
- Explanation: When referring to a person as the most famous among others in a certain category, we use the superlative form "the most famous."
Kenyans are better sprinters.
- Explanation: When comparing the sprinting abilities of different groups, we use the comparative form "better."
Luxurious hotels are more expensive than economic ones.
- Explanation: When comparing the cost of luxurious hotels to economic ones, we use the comparative form "more expensive."
My older sister is afraid of mice.
- Explanation: The correct form for the comparative of "old" is "older" when referring to the age of one's sibling.
Saturn is the 2nd largest planet in our solar system.
- Explanation: To specify that Saturn is the second largest planet, we use the superlative form "the 2nd largest."
We have more homework today than we had yesterday.
- Explanation: When comparing the quantity of homework on two days, we use the comparative form "more."
If you need any further information, please contact our assistant.
- Explanation: The correct form for "far" to indicate additional information is "further."
The second part of the film is more boring than the first.
- Explanation: To compare the level of boredom, we use the comparative form "more boring."
In childhood my aunt was thinner than she is now.
- Explanation: The correct comparative form of "thin" is "thinner" when comparing her weight in different stages of life.
This highway is wider than that highway.
- Explanation: When comparing the width of two highways, we use the comparative form "wider."
My house is closest to the library.
- Explanation: To highlight the proximity of my house to the library, we use the superlative form "closest."
We live in the smallest country in the world.
- Explanation: When referring to the smallest country in the world, we use the superlative form "the smallest."
My best friend lives in the country.
- Explanation: The correct form for the superlative of "good" is "best" when referring to a close friend.