Snow falls on winter day.

Meaning: The sentence describes frozen water falling from the sky in small white flakes during a winter day.

Choice of Words: Snow is a noun that refers to frozen water that falls from the sky in small white flakes. Falls is a verb that means to move downward from a higher to a lower place. On is a preposition that indicates a location or position. Winter is a noun that refers to the season between autumn and spring. Day is a noun that refers to the time between sunrise and sunset.

Alternative Expressions

Snow is falling on a winter day.

Meaning: This sentence also describes the weather on a winter day, when snow is falling from the sky. It's like saying, Right now, on a cold day in winter, snow is falling from the sky.

Choice of Words: Snow is the frozen form of water that falls from the sky in small, white crystals. Is falling means to be moving downwards from a higher place. Winter is the coldest season of the year, when the weather is cold and snowy. Day is the time between sunrise and sunset. When you put them together, "Snow is falling on a winter day" means that snow is currently falling from the sky on a day in the winter season.

It is snowing on a winter day.

Meaning: This sentence is similar to the previous one, but it uses the pronoun "it" to refer to the snow. It's like saying, On a cold day in winter, it is snowing.

Choice of Words: It is a pronoun that refers to something that has already been mentioned or is understood from the context. Is snowing means that snow is falling from the sky. Winter is the coldest season of the year, when the weather is cold and snowy. Day is the time between sunrise and sunset. When you put them together, "It is snowing on a winter day" means that snow is currently falling from the sky on a day in the winter season.

Related Expressions