1. In indicates location inside or within something else.

Pattern 1: verb + in + noun
We live in that house.
The pencils are in the box.

Nouns commonly used after in:

Geographical areas:
city, continent, country, state, town
He lives in Seattle, Washington, in the U.S.A.

Comfortable, protected places:
alcove, large chair, cocoon, nest
He sat down in the chair and read his novel.

Inside areas:
attic, balcony, basement, building, corner, hall, kitchen, office, room She is in her office, in that building, in room 302, in the corner.

Vehicles where the passengers cannot walk around: car, canoe, helicopter, small airplane, small boat We went in the car, but they went in a helicopter.

Publications and speeches
article, book, dictionary, encyclopedia, lecture, magazine, newspaper, speech
He didn't say that in his speech, but I read it in the newspaper.

Pattern 2: be + in + 0 noun
He can't come to the phone because he's in bed.

Nouns commonly used after in:
bed, church, class, jail, place, school, town

Pattern 3: verb + noun + in + noun
Put the pencils in the box.

Typical verbs:
drop, get, insert, lay, place, push, put

Typical nouns:
bag, box, drawer, file, folder, notebook, sack, suitcase, trunk, wallet

2. In indicates membership of a group or category.

Pattern: be + noun + in + noun
There are seven people in our family.
Your brother is the expert in that office.

Nouns commonly used after in:
association, category, choir, chorus, club, family, fraternity, group, office, society, sorority

3. In can indicate a period of time.

Pattern: be + in + time period
century in + the She was born in the 1800s.

Benefits of Apples

Weakness

Apples are known to remove weakness and add vigor and vitality to weak people. It is, therefore, often given to patients to help them recover quickly from their illnesses. If you want to gain weight, apples should be a part of your daily diet. It also helps in detoxifying the body and improving the overall health of the body. Although it doesnt contain a significant amount of protein, the combination of the antioxidant compounds and the protein found in apples can have a major role in preventing weakness and improving muscle tone.