As explained at the relevant lecture, these apparently simple questions rapidly increase in difficulty. As with other practical questions, you do not need to do them all, but you should certainly be happy with the principles involved.
Construct and test grammars which will accept the sentences:
the paper does wrap the stone.
("does wrap" is a straight-forward present tense; it is most easily handled in the context of using an auxilliary verb "to do" with the infinitive form "to wrap").
And if that's okay, then how about questions like:
does the paper wrap the stone?
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