Officials had to prevent people from trying to board the ship.

Did the rules of anthropology prevent the production team from trying to help out?

There was nothing, however, to prevent me from trying to sell it elsewhere.

But that doesn't prevent the artists from trying to think bigger.

But, he added, "that is not going to prevent our government from trying."

But that in itself should not prevent people from trying as many are doing so already.

If we can prevent them from trying to kill us.

That their defeat is going to prevent them from trying again?

Nevertheless, the current situation must not prevent us from trying to improve it.

This attitude did not, however, prevent him from trying to have his work published.