1.   The difference between them lies simply in the fact that while do situates the infinitive in time as an actualization, the modals only situate it as a potentiality.

2.   But who would have thought Kabul, a bombed-out cadaver of a city, was as well situated as Manhattan?

3.   He should not expect to escape the enduring perversity of ignorance and bigotry but should situate himself as an immovable obstacle to their proliferation.

4.   Situated as a pair, they mimicked the human need for companionship.

5.   Thus, we had an airport that was so situated as to be inconvenient to automobiles, taxicabs, buses and other forms of conveyance to any populated area.