Rain fell heavily on forest roof.
Meaning: The sentence describes water falling from the sky in a large amount on the top part of a forest made up of the leaves and branches of trees.
Choice of Words: Rain is water falling from the sky, fell means came down from a higher place, heavily means in a large amount, on means located on top of something, and forest roof is the top part of a forest made up of the leaves and branches of trees. When you put them together, the sentence means that water falling from the sky came down from a higher place in a large amount on the top part of a forest made up of the leaves and branches of trees.
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Related Expressions