When do you put in a sentence?

It seems like you're asking about when to use the word "in" in a sentence. Here's a breakdown of how and when to use "in":

"In" as a preposition:

* Location: "The cat is in the box."

* Time: "I will be there in five minutes."

* State: "He is in danger."

* Movement: "I walked in the door."

* Part of something: "There is a crack in the wall."

* Purpose: "I am writing in support of your proposal."

* After verbs of motion: "I went in the store."

"In" as part of a phrasal verb:

* "In on the secret"

* "In for a penny, in for a pound"

"In" as an adverb:

* "Come in!"

* "He looked in."

Remember, context is key! The best way to know when to use "in" is to understand the meaning you are trying to convey.

Example:

* Incorrect: "I am going the store."

* Correct: "I am going in the store."

Let me know if you have any other questions!