- In To and Into:- The word into is a preposition. It is written as one word. Example: She turned everything she touched into gold. (true) However, on occasion, the words in and to appear next to each other in a sentence, and writers are unsure whether to use into or in to. This happens when the verb in the sentence includes the word in (e.g., hand in, step in, turn in). Examples: Paul wanted to hand the purse in to see if there was a reward. (true) (In this example, the word to is from to see. When a verb is preceded by to, it is said to be in its infinitive form.) Paul wanted to hand the purse in to the police. (true) (In this example, the word to is a preposition in its own right.) More confusion arises with verbs like drive in, put in and fall in. This is because drive into, put into and fall into are equally valid alternatives. Examples: Put the fruit in the basket. (True) (put in - okay) Put the fruit into the basket. (True) (put into - okay) Put the fruit in to the basket. (False) Dive in the water. Dive into the water. (alternative to above) Dive in to the water. (False) Dive in to test the water. --------------------------------------------------------- - On To and Onto :- The guidelines above apply equally to onto. It is noteworthy, however, that onto can mean on top of. When this causes a problem, use on to. Examples: After seeing the sheep, we moved onto the cows. (False) After seeing the sheep, we moved on to the cows. (True)

i think similar to Russian "в" and "на"

You're kidding?