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Hello

1. I can't say what was the reason of my illness was.

2. I can't say what the reason of my illness was.

I believe only the second one is correct.
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Hi,

1. I can't say what was the reason of my illness was.

2. I can't say what the reason of my illness was.

I believe only the second one is correct.

Yes. But it's more natural to say 'for' instead of 'of'.

Clive
Comments  
thanks