be sure of

确信…；确定…

be remarkable for, be representative of, be responsible for, be responsible to sb, be restricted to, be rewarded with, be rid of, be ringed with, be satisfied with, be seated, be short of, be skilled in, be sought after, be squared away, be subject to, be subversive of, be superior to, be supposed to, be supposed to do sth., be sure and..., be sure of oneself, be surprised at, be suspicious of sb., be suspicious of sth., be taken with sb/sth, be tempted to do, be thick with, be tired of, be to blame, be to blame for, be to do sth., be tolerant of, be true of, be true with, be typical of, be unable to, be unaware of, be up against, be up to, be used to,