IN FLOW or IN FLOW: what's the difference?.

In the Russian language there are words, the spelling of which differs by only one letter, but the meaning of the whole sentence depends on its correct use. These words include"during".Or“during”? How to avoid mistakes and, by using a word in a certain context, not to distort its content?

The answer is simple: you need to figure out which part of speech is a word in a particular sentence.

According to the rules of Russian spelling, the derivative preposition " during" is written with the lettereat the end. It is used in speech to indicate the time of an action.

For example:

No one has been in this house for several years.

The issue must be resolved within an hour.

It should be remembered that the preposition "during" can be replaced by another preposition without distorting the meaning of the sentence:

For several years no one has visited this house. (within / for)

The issue must be resolved in an hour.

If a sentence uses a combination of a preposition в and a noun flow in the prepositional case, the letter and should be written in the ending.

For example:

Minor changes were noticed in the course of the river.


  1. The combination “duringand” consists from the nounflowin the prepositional case and the prepositionc.In the course ofandmountain rivers, everything is unpredictable.
  2. A definition can be inserted between the preposition and the noun:In the fast flowof mountain rivers, everything is unpredictable.
  3. The derivative preposition"during", indicating the time of action, is written with the lettereat the end.I will call youwithinefive minutes.
  4. Preposition“during”is an unchangeable service part of speech. Between"in"and"flow", it is impossible to insert a definition or any other term of the sentence.