Her sister opened the door and walked inside.

Meaning: This means to move a door to allow someone or something to enter.

Choice of Words: Opened means to move something so that there is a space or gap for someone or something to pass through. Inside means within or enclosed by something. When you put them together, "Opened the door and walked inside" means that someone moved the door so that it was no longer closed and then entered the area behind it.

Alternative Expressions

The girl opened the door and stepped into the house.

Meaning: This sentence is similar to the first one, but it provides more specific details. The speaker's sister is referred to as a girl, and she stepped into a house rather than just walking inside. This suggests that the house is her home or a place where she lives.

Choice of Words: The is a definite article that refers to a specific person or thing. Girl is a noun that refers to a young female child. Opened is a past tense verb that describes the action of making an opening or entrance. Door refers to a movable barrier that provides access to a building or room. Stepped is a past tense verb that describes the action of moving one's foot or feet. Into is a preposition that describes movement or direction towards the interior of a place. House refers to a building that serves as a living space for one or more people.

The young lady pushed open the door and entered the building.

Meaning: This sentence is the most formal of the three. It uses more sophisticated vocabulary and provides more details about the speaker's sister. She is referred to as a young lady, and she pushed open the door rather than simply opening it. This suggests that the door was heavy or difficult to open.

Choice of Words: The is a definite article that refers to a specific person or thing. Young is an adjective that describes someone who is not yet fully grown or mature. Lady is a noun that refers to a woman, especially one who is polite and well-mannered. Pushed is a past tense verb that describes the action of applying force to move something. Open is a past participle that describes the state of being unlocked or unclosed. Door refers to a movable barrier that provides access to a building or room. Entered is a past tense verb that describes the action of moving into or becoming part of a place.

Related Expressions