know for sure They'll here for sure within half an hour.(肯定地) He couldn 't tell for sure from a distance whether it was George or not Be sure to write to me as soon as you arrive there (一定,千万) She wanted to be sure that he was looked after. He looked behind him to make sure he was not being fo∥owed.(磅定,设法做到) I said it would happen, and sure enough it did happen.(然) She seems very sure of herself, but she isn't really (有信心)• know for sure • They’ll here for sure within half an hour. (肯定地) • He couldn’t tell for sure from a distance whether it was George or not. • Be sure to write to me as soon as you arrive there. （一定，千万） • She wanted to be sure that he was looked after. • He looked behind him to make sure he was not being followed. （确定，设法做到） • I said it would happen, and sure enough it did happen. （果然） • She seems very sure of herself, but she isn’t really. （有信心）