keep a person as a hostage＝hold a person hostage
人を人質にとっておく
keep a person awake
人を眠らせない
keep a person informed about ...
人に…について最新の情報を提供する
keep a person informed of developments
人に最新情報を逐一知らせる
keep a person prisoner [hostage]
人を捕虜［人質］にする
keep [bring] a person up-to-date with [on] ...
…についての最新情報を人に与える
keep a person waiting
人を待たせておく
keep a person waiting for a long time
人を長く待たせる（◆疑問文・否定文ではwait longを用いる：Have I kept you waiting ...
keep a prisoner secure
囚人を厳重に監禁しておく
keep a prisoner under close guard
囚人を厳重な監視下に置く
keep a record (of ...)
（…を）記録する
keep a record of ...
…をずっと記録する
keep a restaurant
レストランを経営する
keep [hold onto] a seat
議席を維持する
Keep a seat for me [me a seat], please.
席を取ってください
keep a secret
秘密を守る
keep a secret
秘密を守る
keep a sharp watch [lookout] for ...
…を油断なく見張る
Keep a steady eye on them.
彼らを絶えず見張っておけ
keep a stiff upper lip
((比喩的に))冷静さを失わない
keep a student after school
放課後生徒に居残りさせる
keep a suspicious eye on ...
…から疑いの目を離さない
keep a tight rein on him
彼を厳しく取り締まる
keep a tight rein on the media
メディアを厳しく統制する
keep a wary eye on ...
…を注意深く見守る
keep [be on] a watch (out) for ...
…をよく見張る［警戒する］
keep a watchful eye on political developments
政治の成り行きを注意深く見守る
keep [be, stay] abreast with [of] the times
時勢に遅れない
keep accounts
簿記［帳簿］をつける
keep active troops fit for service
戦闘部隊をいつでも出動できるように保つ
keep [arrange, miss] an appointment
約束を守る［取り決める，逸する］
keep an ear cocked
((略式))耳をそば立てる
keep an eye [a watch, guard] on ...
…の監視［張り番，警備］を続ける
keep apples in cold storage
リンゴを冷蔵しておく
Keep as many as you need.
必要なだけお持ち帰りください
keep at home [within doors]
家に閉じ込もる
Keep at it!
((略式))がんばれ
Keep away from me.
私に近づかないで
Keep away [back]!
（危険だから）離れて
keep [get into] bad company
悪い仲間とつきあう［つきあうようになる］
keep both Powers in equilibrium
両強国の勢力の均衡を保つ
keep [stay, remain] calm
平静を保つ
keep cave
見張る
keep [miss] chapel
礼拝式に出席［欠席］する
keep children safe from abuse
虐待から子どもを安全に守る
keep clear of the area
その地区に近寄らない
keep control of ... ＝keep ... under control
…を制御する
keep [stay] cool
落ち着いている
keep cows
牛を飼う
keep cows [chickens]
牛［鶏］を飼う
