Most deserts receive several rainfalls each year. I live in the Chihuahuan Desert and we had a brief rain shower yesterday, August 26, 2015. More is in the forecast for the next few days. It is our monsoon season.
Yes, heavy rains can cause erosion in a desert.
It rains regularly in Egypt. Believe it or not, Egypt is not entirely covered in desert.
It is raining somewhere in Africa right now. Not all of Africa is the second driest desert in the world.
A homophone for "rained" is "reigned".
If it received more than 10 inches (250 mm) of rainfall per year, on average, it would no longer be considered a desert.
The past tense of "rain" would be "rained".It rained is the past tense
Rained is the past tense verb in "It rained last night."
It usually rains somewhere in the Atacama every year. The amount is little more than a sprinkle and some areas of the desert have not experienced any rainfall in historic times.
it always rained
'It was a dreadful winter that year. It rained and rained and rained for two long months.'
A homophone for "reigned" is "rained".
'It rained like cats and dogs.'