as a noun, 'rains' refers to the plural form of 'rain,' which means the condensed moisture of the atmosphere falling visibly in separate drops.
'rains' can refer to multiple instances of rainfall or a season characterized by heavy rainfall, especially in regions with monsoon climates. It can be used to describe the weather condition or the water droplets themselves.
The rains in April brought flowers in May.
The monsoon rains are expected to arrive early this year.
Farmers rely on the annual rains for a good harvest.
don't confuse 'rains' (noun) with 'reins' (the straps used to control a horse) or 'reigns' (related to ruling or monarchy). In some contexts, 'rain' and 'rains' can be used interchangeably, but 'rains' often implies a more extended or recurrent period of rainfall.
as a verb, 'rains' describes the action of rain falling. It's the third person singular form of the verb 'rain.'
when talking about it raining in the present tense, and the subject is third person singular (like 'it'), use 'rains.' It's often used in descriptive contexts to talk about weather conditions.
It often rains in the Pacific Northwest.
When it rains, it pours.
If it rains tomorrow, we'll have to cancel the picnic.
'rains' as a verb is typically used in impersonal constructions with 'it' as the subject. For example, 'It rains heavily in the tropics.' Avoid redundant phrases like 'rain water.' Since rain is water, simply use 'rain.'