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(1) 必(一)定(certain to do sth)[A+to-inf][作pred]：It is～to rain/to happen.肯定會下雨/這事一定會發(fā)生。He is～to succeed/to win/to be late.他肯定會成功/贏/遲到。This article is～to go up in price.這種物品肯定會漲價。〖同〗sure，certain;〖反〗unsure，uncertain;

(2) 下決心的(having a firm intention)[A+to-inf] [作pred]：She is～and determined to go.她決心要走?！纪絛etermined，resolved;

(3) 應當，理應(obliged by law， duty or an agreement to do sth) [A+to-inf][作pred]：I am (feel)～to tell you/to admit that...我應該(覺得應該)告訴你/承認…… I am (feel)～to mention it.我應當(覺得應當)提一下這事。The borrower is～by contract/a promise to pay off the debt in two years.遵照契約/諾言，借款人應當在兩年內(nèi)還清債務。〖同〗obliged;

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

bound up with sth 與……有密切關系：My personal finances are closely～up with the future of the whole business.我個人的經(jīng)濟狀況與整個企業(yè)的前途密切相關。Our personal welfare is closely～up with that of the community.我們個人的福利與社會的福利密切相關。