be+sure+or+certain+of
131for certain — adverb definitely or positively ( sure is sometimes used informally for surely ) the results are surely encouraging she certainly is a hard worker it s going to be a good day for sure they are coming, for certain they thought he had been killed… …
132make certain — see under ↑make1 • • • Main Entry: ↑certain * * * make certain phrase to take action in order to be sure that something happens or to be sure that it is true make certain (that): You should call to make absolutely certain everything is in order …
