Cup fills.

Meaning: This means that the cup is being filled with a liquid. For example, when coffee is being poured into a cup, you can say that the cup is filling up.

Choice of Words: Cup is a noun that refers to a small, open container used to drink liquids. Fills is a verb that means to put something in a container until it is full. When you put them together, "Cup fills" means that a liquid is being added to the cup until it is full.

Alternative Expressions

The cup is filling.

Meaning: This means that the cup is gradually becoming full of something, like water, juice, or milk.

Choice of Words: The is used to refer to a specific cup. Is is a verb that means to be or to exist. Filling is a present participle that means to become full. When you put them together, "The cup is filling" means that the cup is in the process of becoming full.

The cup is full.

Meaning: This means that the cup has been filled to the top and cannot hold any more liquid.

Choice of Words: The is used to refer to a specific cup. Is is a verb that means to be or to exist. Full means to contain as much as possible. When you put them together, "The cup is full" means that the cup has reached its capacity and cannot hold any more.

Related Expressions