It is natural that the child (should) be punished.
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It is necessary that you should see a doctor right now.
It is important that I walk along the road every morning.
It is impossible that he finish the work in an hour.
It is strange that she should have come home so late at night.
It is true that people live longer than they did before.
It is doubtful whether she will come.
It is regrettable that few people should walk today because of the development of traffic facilities.