'struck' vs 'stricken'

Correct to all?

  1. Lightning ‘struck’ the house.

  2. Lightning ‘had struck’ the house before we went to the mall.

  3. The judge said that it would be ‘stricken’ (not ‘struck’) from the record.

  4. She was stricken ‘by’ (or ‘with’) the illness in late January.

  5. She was ‘stricken with’ remorse.

  6. He was ‘stricken by’ guilt.

  7. The illness ‘struck’ her in late January.


Why are there punctuation marks around the variations of ‘strike’? They are incorrect unless you wish to imply that this was not really the case.