Question

关于英语单词前置im和in的问题～！

关于英语单词前置im和in的问题～！请问，英文单词前置in或im的问题～！英语单词前置in和im的问题～！in和im放在英语单词前面，都是反义词的意思，in放在名词和形容词之前，im放在m/b/p开头的单词前。
但是当一个单词是以m或b或p开头，且单词词性是名词或形容词，
那么这个单词的反义词，是应该前置in还是im呢？
例如：immoral，它就是m开头，但词性又是名词兼形容词！为什么就加im，而不是in呢？

Answer 1

你这就好像在问牛的序数为什么是头而不是只一样，讲道理，外国人学英语也没几个会花太多时间去研究语法的，能正常沟通就行，全凭语感
还有impossible，如果是its impossible也可以译成那是不可能或者那是不可能的事，翻译本来就是不准确的
http://www.dictionary.com/browse/in-去看下这个

in-的四种解释
1.
a prefix representing English in (income; indwelling; inland, etc.), butused also as a verb-formative with transitive, intensive, or sometimeslittle apparent force ( intrust; inweave, etc.).
2.

a prefix of Latin origin meaning primarily “in,” but used also as a verb-formative with the same force as
3.
a prefix of Latin origin, corresponding to English un-, having a negative or privative force, freely used as an English formative, especially of adjectives and their derivatives and of nouns (inattention; indefensible; inexpensive; inorganic; invariable). It assumes the same phonetic phases as in-2. (impartial; immeasurable; illiterate; irregular , etc.)
4.
Synonym StudyExpand
The prefixes in- and un- may both have, among other uses, a negativeforce. In- is the form derived from Latin, and is therefore used in learnedwords or in words derived from Latin or (rarely) Greek: inaccessible,inaccuracy, inadequate,etc. Un- is the native form going back to Old English,used in words of native origin, and sometimes used in combination withwords of other origins if these words are in common use: unloving, ungodly,unfeeling, unnecessary, unsafe.

im-
1.
variant of in-2. before b, m, p: imbrute; immigrate; impassion.
2
variant of in-3.before b, m, p: imbalance; immoral; imperishable.
3
variant of in-1.before b, m, p: imbed; immure; impose.

Word Origin and History for im-Expand

variant of in- before -b-, -m-, -p-, in the sense of "not, opposite of" (immobile, impersonal) as well as "in, into" ( implant, impoverish). See in-.In some English words it alternates with em- (1).

Answer 2

这好像是很久之前的问题了，我想试着解释一下，你要不不要理解的太细致，尝试着只把M/B/P开头的前缀加im，因为是闭口音。