(1) 必(一)定(certain to do sth)[A+to-inf][作pred]：It is～to rain/to happen.肯定会下雨/这事一定会发生。He is～to succeed/to win/to be late.他肯定会成功/赢/迟到。This article is～to go up in price.这种物品肯定会涨价。〖同〗sure，certain;〖反〗unsure，uncertain;

(2) 下决心的(having a firm intention)[A+to-inf] [作pred]：She is～and determined to go.她决心要走。〖同〗determined，resolved;

(3) 应当，理应(obliged by law， duty or an agreement to do sth) [A+to-inf][作pred]：I am (feel)～to tell you/to admit that...我应该(觉得应该)告诉你/承认…… I am (feel)～to mention it.我应当(觉得应当)提一下这事。The borrower is～by contract/a promise to pay off the debt in two years.遵照契约/诺言，借款人应当在两年内还清债务。〖同〗obliged;

bound up in sth 十分忙(热衷)于：She is very～up in her work.她十分热衷于她的工作。

bound up with sth 与……有密切关系：My personal finances are closely～up with the future of the whole business.我个人的经济状况与整个企业的前途密切相关。Our personal welfare is closely～up with that of the community.我们个人的福利与社会的福利密切相关。