The correct statement is: He is unhappier than his friend. Two or three syllable adjectives made up of un- take -er or -est.

The statement is : Platinum is more precious than any metal. When two objects are compared with each or, latter terms of comparison must exclude former.

The statement is false. The comparative in er is not used when we compare two qualities in same person or thing. For example: Meera is more pretty ( not prettier) than wise. The suffix ?er? is used only when comparing two completely different entities or a specific quality in two different entities. Example: Ann is prettier than Mary.

The positive of most (quantity) is much and its comparative is more. The positive of most (number) is many.

The correct statement is: Milk is cheaper than water. In this case, using ?cheapest? would be incorrect, since it?s a comparison between only two entities, that is milk and water. Most one syllable adjectives form ir comparatives and superlatives with -er/-est. However, participles used as adjectives are exceptions, as, I?ve never felt more tired in all my life.

The comparative of late with respect to time is later and superlative is latest. With respect to position, comparative is latter and superlative is last.

Degrees of comparison can be classified into three types. They are : positive degree, comparative degree and superlative degree. For example , good is positive, better is comparative and best is superlative.

The correct statement is: Karan is older than Kashish. Elder is not used followed by than and so we use older.

The correct statement is : She is prettiest girl in class. We do not use -er/-est toger with more or most.

The correct statement is: Aahna is stronger than Neha. Most one-syllable adjectives form ir comparatives and superlatives with -er/-est.