Question

Adjectives: forms Adjectives and adverbs Unlike in many other languages, adjectives in English do not change (agree) with the noun that they modify:All new foreign students are welcome to join the clubs and societies.Not: All new foreigns students …Every room was painted in different colours.Not: … in differents colours. Identifying adjectivesThere is no general rule for making adjectives. We know they are adjectives usually by what they do (their function) in a sentence. However, some word endings (suffixes) are typical of adjectives.suffixexamples-able, -iblecomfortable, readable, incredible, invisible-al, -ialcomical, normal, musical, industrial, presidential-fulbeautiful, harmful, peaceful, wonderful-icclassic, economic, heroic, romantic-icalaeronautical, alphabetical, political-ishBritish, childish, Irish, foolish-ive, -ativeactive, alternative, creative, talkative-lessendless, motionless, priceless, timeless-eous, -ious, -ousspontaneous, hideous, ambitious, anxious, dangerous, famous-yangry, busy, wealthy, windyWarning: Adjectives ending in -ic and -ical often have different meanings:The economic policy of this government has failed.A diesel car is usually more economical than a petrol one.See also:  Adjectiveshttps://dictionary.cambridge.org/grammar/british-grammar/adjectives  Classic or classical?https://dictionary.cambridge.org/grammar/british-grammar/classic-or-classical  Economic or economical?https://dictionary.cambridge.org/grammar/british-grammar/economic-or-economical  Historic or historical?https://dictionary.cambridge.org/grammar/british-grammar/historic-or-historical  Forming adjectives from other wordsSuffixesSome adjectives are made from nouns and verbs by adding suffixes.nounadjectiveheroheroicwindwindychildchildishbeautybeautifulverbadjectivereadreadabletalktalkativeuseusefullikelikeableI hate windy days.San Francisco is a very hilly place.Some words ending in -ly can be both adjectives and adverbs. These include daily, early, monthly, weekly, nightly, yearly:Adjective: She gets a weekly payment from her parents. (She gets money every week.)Adverb: I pay my rent weekly. (I pay my rent every week.)Some words ending in -ly are only adjectives and not adverbs. These include: costly, cowardly, deadly, friendly, likely, lonely, lovely, oily, orderly, scholarly, silly, smelly, timely, ugly, woolly.We enjoyed the trip to America but it was a costly holiday.Oily fish is very healthy because it contains omega 3.See also:  Word formationhttps://dictionary.cambridge.org/grammar/british-grammar/word-formation  Adverbshttps://dictionary.cambridge.org/grammar/british-grammar/adverbs  Prefixeshttps://dictionary.cambridge.org/grammar/british-grammar/prefixes  Suffixeshttps://dictionary.cambridge.org/grammar/british-grammar/suffixes  PrefixesPrefixes such as un-, in-, im-, il- and ir- change the meaning of adjectives. Adding these prefixes makes the meaning negative:un-in-ir-fair – unfairactive – inactiveresponsible – irresponsiblehappy – unhappyappropriate – inappropriateregular – irregularsure – unsurecomplete – incompletereducible – irreducibleim-il-balance – imbalancelegal – illegalpolite – impolitelegible – illegiblepossible – impossiblelogical – illogicalSee also:  Prefixeshttps://dictionary.cambridge.org/grammar/british-grammar/prefixes  Suffixeshttps://dictionary.cambridge.org/grammar/british-grammar/suffixes   Adjectives: comparative and superlativeMany one-syllable adjectives have endings to show the comparative and superlative.base formcomparativesuperlativefinefinerfinestyoungyoungeryoungestsmallsmallersmallestSome two-syllable adjectives which end in an unstressed syllable also have these endings.base formcomparativesuperlativeeasyeasiereasiestfunnyfunnierfunniestgentlegentlergentlestHowever, we do not use these endings with two-syllable adjectives ending in a stressed syllable nor with longer adjectives with more than two syllables. The comparatives and superlatives of these adjectives are formed using more and most.base formcomparativesuperlativecompletemore complete Not: completermost complete Not: completestinterestingmore interestingNot: interestingermost interestingNot: interestingestSee also:  Comparative and superlative adjectiveshttps://dictionary.cambridge.org/grammar/british-grammar/comparison-adjectives-bigger-biggest-more-interesting#comparison-adjectives-bigger-biggest-more-interesting__1  Adjectives: with -ing and -ed (interesting, interested)We use the -ing and -ed forms of regular and irregular verbs as adjectives:-ing formsverbexampleannoyMy brother is five and he’s so annoying.amazeThe Grand Canyon is an amazing place.boilBe careful! That’s boiling water!exciteThis film is not very exciting, is it? -ed formsverbexampleboreWhy do teenagers always look bored?packJames Bond movies are always action-packed.smokeNot everyone likes smoked salmon.makeMy dress is hand-made. I really like it.teachMy Master’s degree was a taught course.exciteI feel excited about my new job.Adjectives with -ing and -ed endings have different meanings.-ing adjectives-ing adjectives describe the effect-ed adjectives-ed adjectives describe how a person feelsThe meeting was very boring.That was an exciting game.It was shocking to see what the storm had done to the house.I felt bored at the meeting.We were really excited about the game.We were shocked to see what the storm had done to the house.Warning: Commonly confused pairs of adjectives ending in -ing and -ed are: interesting, interested; boring, bored; exciting, excited; embarrassing, embarrassed.

Accepted Answer

https://dictionary.cambridge.org/grammar/british-grammar/adjectives-forms about adjectives and adverbs

Adjectives Ing Ending I Comparative Interesting Forms Complete

Identifying adjectives

Forming adjectives from other words

Suffixes

Prefixes

Adjectives: comparative and superlative

Adjectives: with -ing and -ed (interesting, interested)

-ing forms

-ed forms