It was raining heavily.

Suddenly a thunder struck.

My son went to me and said he was scared.

"What's happened?" I said.

"It's thunder."

"It's a thunder."

Do we need to add indicate the amount for thunder when he was going to tell you the thunder just struck?

1 Answer 1


No, "a thunder" is never used because "thunder" is only used to mean a plural. You could say "a clap of thunder" or " the noise of thunder" but not just "a thunder".

By the way "what's happened" is grammatical but unnatural sounding. Normally people just say "what happened".

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