1. Under no circumstances can I postpone payment on my loan<br/><br/>2. Under no circumstances may audience consume alcohol<br/><br/>3. Under no circumstances are we <b>to</b> allow this man to escape<br/><br/>Hi..Why is it a necessity to include <b>to</b> before <b>allow</b> when the first two examples don't require one?<br/><br/>Thank you