It is a declarative sentence.
There are many ways to improve this sentence. Here are some possibilities:Sleeping in the rain caused Joey to develop a cold.Sleeping in the rain was the reason Joey developed a cold.My friend slept in the rain and caught a cold as a result.Note that all of these examples refer to a person. Because the sentence refers to a cold that someone has already caught by sleeping in the rain, it is necessary to refer to that specific person. If you want a general sentence about the risk of sleeping in the rain, the sentence cannot be in the past tense. For example, you could say "Sleeping in the rain can lead to developing a cold."
The rain permeated through the screen.
The rider grabbed the horses reins and rode away in the rain
The rain storm was violent, our clothes were sodden
The word "rain" can be a noun or a verb. For example, in the sentence, "I like rain." it is a noun. In the sentence "It is going to rain." it is used as a verb.
Example sentence - It is quite feasible for it to rain today even though rain is not in the forecast.
They mean that the rain is now starting to fall.
It is wise to rein in the horses when you get caught out in the rain.
Example sentence - The popular restaurant is design to look like a rain forest.
As a question: have you ever scene a rain forest before? As a sentence: there is a rain forest on places that get a lot of rainfall.
Walked is the verb in the sentence, "Damien and Gavin walked to school in the rain."
It is a declarative sentence.
It began to rain when the thunderstorm approached.
easy, the rain shadow effects mountains
Oh, the rain spoilt your game.
It is a noun.