What are the rules of negative prefixes for adjectives?

There is no fixed rule for whether a word is prefixed with un-, in- or dis-, so you have to pay attention to remember them one by one, and in English, you can add a negative prefix to the beginning of a word, which becomes the antonym of the word.

Such negative prefixes mainly include dis-, il-, im-, in-, ir- and un-, which can be translated into Chinese "非", "无", "不 (yes)", "未", etc.

1.dis- is often added before nouns, adjectives, verbs. Such as:

agreement (Agreed; disagreement; inconsistency).

advantage (advantage; favorable conditions; disadvantage; Cons).

honest — dishonest

2.im- is often added before adjectives that begin with the letters m-, p-. Such as:

moral – immoral possible – impossible (impossible).

polite (polite; (polite) — impolite (rude; Rude)

3.un- is often added before nouns, adjectives, adverbs. Such as:

happiness —unhappiness (unhappy) usual (usual) —unusual (unusual; rare)

important — unimportant

friendly —unfriendly (unfriendly; unfriendly).

healthy —unhealthy (unhealthy; not good for health).

crowded —uncrowded (not crowded) able (can; will) —unable (incompetent; No, it won't).

fair (fair; Fair) — unfair (unfair; unjust).

familiar (familiar) —unfamiliar (unfamiliar; Inexperienced)

Necessary — Unnecessary

Fortunately — Unfortunately

4.in- is often added before nouns and adjectives. Such as:

ability —inability; Weak) correct — incorrect

5.ir- is often added before an adjective that begins with r-. Such as:

regular(regular) — irregular(irregular; irregular).

The words that prefix in indicates negation are: inability, inaccurate, incorrect, incapable, and so on.

in- is often added before adjectives, nouns, and is a negation prefix.

A prefix, i.e. a specific word (e.g., re-) is added to the root word (e.g., union) to make it another new word with a new meaning (e.g., reunion).

A prefix that represents a negation, for example:

Adjectives that begin with the letters b, m, p, have a negative prefix im-. For example: imbalance, immoral, impossible.

Words that begin with the letter L use il-; Words that begin with the letter r are marked with ir-. For example: illegal, illogical, irregular, irrerelative.

The one that starts with the other letters is in-. Examples: inhuman, injustice, inseparable, incorrect.

There is no pattern. There are just a few variations of the ridge: dis-, un-, im-, etc.

Supplement Pure Wild Eyes:

The method of memorization is to memorize words of the same type together and read them several times to memorize them.

Negative prefix: un-: added before an adjective, e.g. unimportant, unable; Add undo before the verb, e.g. uninstall

im-: Generally added before words beginning with the letters b, m, p (b-8p-m--

Such as: imbalance, immoral, impossible.

ir-: Words that start with the letter r, e.g. irregular, irregular, irrelative, irrerelational.

il-: Words that begin with the letter l, e.g. illegal, illogical.

in-: Words that begin with other letters. For example: inhuman is inhuman, injustice is not separated, inseparable is inseparable, incorrect is incorrect.

dis-: Added before some verb or noun to form antonyms.

Such as dishonst

1.Prefix 1) Pure Mind Only Negative Prefix a-,an-,asymmetry (asymmetry) Anhydrous (anhydrous) dis-dishonest,dislike in-,ig-,il,im,ir,incapable,inability,igno ble,impossible,immoral,illegal,irregula r ne- ,n-,none,ne...