Use “in” to show location: “The keys are in the drawer.”
Use “in” to show time periods: “We met in July.”
Use “in” to show inclusion: “She is in the team.”
Use “in” to show a state or condition: “He is in trouble.”
Use “in” to show a language or medium: “The book is in English.”
Use “in” to show movement into something: “He put the letter in the envelope.”
Use “in” with places or areas: “They live in New York.”
Use “in” with parts of a day: “We will leave in the morning.”
Use “in” to show involvement: “I’m interested in music.”
Use “in” to show a limit or range: “The answer is in the text.”