be bound to

... 肯定的,积极的,绝对的,无疑的,正的：positive 肯定，注定;一定要;决心：be bound to 课程协调人/班主任：coordinator ...

 be sure to

...:PSH郑码:HDYD笔顺编号:1553四角号码:47720UniCode:CJK 统一汉字 U+5207英汉互译切anxious（形容词，急切）be sure to（一定要）chip（动词，切、削）chop（动词，削、劈、砍）correspond（动词，符合）cut（动词，切）knife（动词，铡）shear（动词，剪断）康...

 Must Be

... you：你 must be：一定要，必须 interested：有兴趣 ...

 be sure to do sth

... be strict in 对某事要求严格 be sure to do sth. 一定要；务必 be supposed to do sth.应该做某事 ...