School students need to reveal distinctive signs of pretexts and prefixes. It must be done, not to make mistakes on the letter as pretexts are written always separately, and prefixes - together or through a hyphen.
Instruction
1. The most important difference to which you have to pay attention is that the pretext is a word, and a prefix - a part of a word, i.e. a morpheme. It can be understood, having put a word in an initial form, i.e. to use it in the Nominative case. The prefix will remain in a word, unlike a pretext. For example: behind the wall (prepositional case) - a wall (Nominative case); to the hermit (dative case) - the hermit (Nominative case). In the first case pro is a pretext, and in the second - a prefix.
2. Further try to raise a question. Between a pretext and other word (noun or an adjective) you will be able to put it and also will be able to use still some word. For example: for (than? what?) the house, behind the multi-storey building. And here between a prefix and a word, naturally, it is impossible to raise a question as it is a part of the same word.
3. You have to understand that pretexts connect words in phrases or in offers, i.e. they form grammatical forms of a word. For example, in syntactic unit "behind the wall" the pretext pro helps with formation of a form of a noun in an instrumental case. Prefixes form new words. For example, the word "small" is formed by means of a prefix "not".
4. It is also possible to try to distinguish a pretext from a prefix on a way of writing. If it conjoint, then you most often deal with a prefix. This morpheme will need to be written only in some pronouns and adverbs through a hyphen. So, hyphenated writing will be in adverbs with a prefix "on" and suffixes to "it", "ohm" or "and". For example, the prefix "on" should be written in the word "friendly" through a hyphen.
5. Only in exceptional cases the prefix is written separately. It occurs in writing of indefinite pronouns and adverbs when it is separated from a word by a pretext. For example, in a pronoun "with someone" a prefix "which" is written separately.
6. Pretexts with all words are written only separately. For example, in a phrase "ask about the help" a pretext is the word "about".