structural particle: used after a verb (or adjective as main verb), linking it to following phrase indicating effect, degree, possibility etc
            
            
              to obtain
            
            
              to acquire
            
            
              to get
            
            
              to gain
            
            
              suit
            
            
              proper
            
            
              ready
            
            
              finished
            
            
              to be satisfied
            
            
              to permit
            
            
              to need to
            
            
              to have gone as far as to
            
            
              to have even done
            
            
              can