Jane insisted that her son "washed" his hands before eating.

[sitifan]

1. Jane insisted that her son wash his hands before eating.
2. Jane insisted that her son should wash his hands before eating.
3. Jane insisted that her son washed his hands before eating.
Is #3 acceptable to native speakers?

 

[5jj]

It is to many.

 

[sitifan]

1. Jane insisted that her son wash his hands before eating.
2. Jane insisted that her son should wash his hands before eating.
3. Jane insisted that her son washed his hands before eating.

I think #1 and #2 have the same meaning.
Does #3 have the same meaning as #1 or #2?

 

[emsr2d2]

1 and 3 mean the same. 2 is different. In 2, she only insisted that he should wash his hands (she thought it would be a good idea for him to do that). In 1 and 3, she actually insisted that he do it.

 

[5jj]

All three can mean the same - The washing of the hands (if it occurred) occurred because Jane insisted on it.

#3 could also mean that Jane insisted on the truth of the fact the her son washed his hands.

 

[Skrej]

#3 could also mean that Jane insisted on the truth of the fact the her son washed his hands.

That's the only possible interpretation of #3 for me.