They sound the same, but a space makes all the difference. Into and in to have different uses. Here are some examples.
I'm going to tackle this in parts.
- "Into" versus "in"
- "Into" versus "in to"
- Sample sentences
"Into" Versus "In"
When you use in, you're indicating position.
Her phone was in her pocket.
When you use into in a sentence, you're indicating movement; an action is happening.
She stuffed her phone into her backpack.
"Into" Versus "In to"
Into is a preposition that has many definitions, but they all generally relate to direction and motion.
On the other hand, in by itself can be an adverb, preposition, adjective, or noun. To by itself is a preposition or an adverb or part of an infinitive, such as to fly. Sometimes in and to just end up next to each other. Some examples will help!