We build a sandcastle at the beach.

Meaning: This means that people create a structure made of sand on the shore of a body of water.

Choice of Words: Build means to construct or create something, sandcastle is a structure made of sand, and beach is a sandy shore beside a body of water.

Alternative Expressions

The children built a sandcastle at the beach.

Meaning: This sentence describes an action that a group of children did at the beach. It means that they created a sandcastle, which is a structure made of sand, at the beach.

Choice of Words: The is a definite article that indicates that we are talking about a specific group of children, not just any children. Children is a noun that refers to young people, usually under the age of 18. Built is a verb that means to create or construct something. A is an indefinite article that indicates that we are talking about one sandcastle, not a specific one. Sandcastle is a noun that refers to a structure made of sand, usually built by children at the beach. At is a preposition that indicates the location of the action. The is a definite article that indicates that we are talking about a specific beach, not just any beach. Beach is a noun that refers to a sandy area next to a body of water.

We are building a sandcastle at the beach.

Meaning: This sentence describes an action that a group of people are doing now at the beach. It means that they are creating a sandcastle, which is a structure made of sand, at the beach.

Choice of Words: We refers to the group of people involved in the action. Are is a verb that indicates that the action is happening now. Building is a verb that means to create or construct something. A is an indefinite article that indicates that we are talking about one sandcastle, not a specific one. Sandcastle is a noun that refers to a structure made of sand, usually built by children at the beach. At is a preposition that indicates the location of the action. The is a definite article that indicates that we are talking about a specific beach, not just any beach. Beach is a noun that refers to a sandy area next to a body of water.

Related Expressions