before是什么时态的标志词
现在完成时态或过去完成时态。before可以用于现在完成时态，也可以用于过去完成时态。当before作为副词时，作时间状语，通常用现在完成时，表示从现在开始之前的任何时刻，或者过去某一时间或动作之前已经发生或完成的动作或存在的状态。因此，可以说是现在完成时或过去完成时的标志。如果用在过去完成时，before后要跟过去式的句子或过去时的时间状语。总之，before在不同情况下，既可以是现在完成时，也可以是过去完成时。要根据具体情况判断使用哪种时态。
绛旓細鐜板湪瀹屾垚鏃鐨勬爣蹇鏄痑lready銆亂et銆before銆乯ust銆傚畬鎴鏃舵佺殑鏋勬垚鍒嗕负涓ら儴鍒嗭細涓鏄姪鍔ㄨ瘝锛屼簩鏄疄涔夊姩璇嶇殑杩囧幓鍒嗚瘝-ed銆傚叿浣撴潵璇达紝鐢ㄥ姪鍔ㄨ瘝have琛ㄧず鈥滄椂鈥濓紝浠ヨ〃鏄庡姩浣滃彂鐢熺殑鏃堕棿鏄湪杩囧幓銆佺幇鍦ㄨ繕鏄皢鏉ワ紱鐢ㄨ繃鍘诲垎璇嶆潵琛ㄧず鍔ㄤ綔鐨勨滄佲濓紝浠ヨ〃鏄庤鍔ㄤ綔宸茬粡瀹屾垚銆傚畠鐨勬瀯鎴愭槸锛氫富璇+鍔╁姩璇(have/has) +...
绛旓細涓鑸繃鍘绘椂鏄寚琛ㄧず杩囧幓鍙戠敓鐨勫姩浣滄垨鐘舵佺殑鏃舵锛屽叾鏍囧織璇鏈夊緢澶氱锛屼互涓嬫槸鍏朵腑鐨20涓細1. yesterday锛堟槰澶╋級2. last night锛堟槰鏅氾級3. last week锛堜笂鍛級4. last month锛堜笂涓湀锛5. last year锛堝幓骞达級6. ago锛堜互鍓嶏級7. before锛堜互鍓嶏級8. then锛堝綋鏃讹級9. once锛堟浘缁忥級10. already锛堝凡缁忥級11....
绛旓細鍥炵瓟濡備笅锛氳繖涓before寮曞鐨勬椂闂寸姸璇粠鍙ョ殑鏃舵鏄竴鑸繃鍘绘椂锛屽悗闈富鍙ョ殑鏃舵佸彲浠ョ敤涓鑸繃鍘绘椂浠ｆ浛杩囧幓瀹屾垚鏃躲傚叾鐞嗙敱鏄細浠庡睘杩炶瘝before (鍦 ...涔嬪墠)宸茬粡琛ㄦ槑浜嗕袱涓皳璇姩浣滅殑鏃堕棿鍏堝悗锛屾晠涓诲彞鐢ㄨ繃鍘诲畬鎴愭椂鎴栦竴鑸繃鍘绘椂鍧囧彲锛屼笉浼氬奖鍝嶄汉浠殑鐞嗚В銆備緥濡傦細Before he died, he had written / wrote his ...
绛旓細鐜板湪瀹屾垚鏃鐨勬爣蹇楄瘝鏈夛細just锛宔ver锛宯ever锛寉et锛宎lready锛宖or锛before锛宻ince锛宻o far锛宺ecently锛宼wice锛宻till锛宼ill now锛寀p to now锛宼hree times绛夈傜幇鍦ㄥ畬鎴愭椂锛圱he Present Perfect Tense锛夋槸杩囧幓鐨勫姩浣滄垨鐘舵佹寔缁埌鐜板湪锛屾垨瀵圭幇鍦ㄩ犳垚鐨勫奖鍝嶏紝鍙兘鎸佺画鍙戠敓涓嬪幓銆傚湪鑻辫鏃舵涓紝鈥滄椂鈥濇寚鍔ㄤ綔鍙戠敓鐨...
绛旓細杩囧幓杩涜鏃鐨勬爣蹇楄瘝鏈夛細last night銆乴ast Saturday銆乼his morning銆乼he whole morning銆乤ll day銆亂esterday銆乫rom nine to ten last evening銆乤t that time銆乴ast 銆乤go 銆before绛夈傝繃鍘昏繘琛屾椂浠嬬粛锛氫竴銆 姒傚康鍜岀敤娉曪細杩囧幓杩涜鏃躲傝〃绀鸿繃鍘诲湪鏌愪竴鏃堕棿娈垫垨鏌愪竴娈垫椂闂村唴姝ｅ湪鍙戠敓鎴栬繘琛岀殑鍔ㄤ綔鎴栫姸鎬併傚叾...
绛旓細鐜板湪瀹屾垚鏃剁殑鏃堕棿鏍囧織璇锛歛lready鐢ㄥ湪鑲畾鍙ヤ腑锛坆e鍔ㄨ瘝銆佸姪鍔ㄨ瘝銆佹儏鎬佸姩璇嶄箣鍚庯紝瀹炴剰鍔ㄨ瘝涔嬪墠锛夊父涓巠et杩涜杞崲銆倅et鏀惧湪鍚﹀畾鍙ュ拰涓鑸枒闂彞鍙ユ湯銆俿ince+鏃堕棿鐐=for+鏃堕棿娈祍ince+涓鑸繃鍘鏃舵佺殑鏃堕棿鐘惰浠庡彞=since+鏃堕棿娈+ago銆俿ince+涓鑸繃鍘绘椂鎬佺殑鏃堕棿鐘惰浠庡彞銆備緥濡傦細He has been here since he joined...
绛旓細杩囧幓鏃鐨勬爣蹇楄瘝璇锛歽esterday锛宭ast锛宎go锛before锛宨n+骞存垨鏈堬紝on+鏃ワ紝just now(鎴栬卆 moment ago)銆傚啀鍔犱笂was+v-ing锛屽氨鍙互鍒ゆ柇杩欎釜鍙ュ瓙鏄繃鍘昏繘琛屾椂浜嗐傝繃鍘昏繘琛屾椂鐨勮瑷鏍囧織 were/was doing sth.杩欐槸鏍稿績,鎸囧綋鏃舵鍦ㄥ共浠涔.鏃堕棿鏍囧織then,at that time绛夌瓑銆1銆亀as+鍔ㄨ瘝ing,渚嬪锛欼 was ...
绛旓細鐜板湪瀹屾垚鏃鏍囧織璇鍒嗗埆鏄細just锛宔ver锛宯ever锛寉et锛宎lready锛宖or锛before锛宻ince锛宻o far锛宺ecently锛宼wice锛宻till锛宼ill now锛寀p to now锛宼hree times绛夈1銆佺幇鍦ㄥ畬鎴愭椂鍚箟 鐜板湪瀹屾垚鏃(The Present Perfect Tense)鏄繃鍘荤殑鍔ㄤ綔鎴栫姸鎬佹寔缁埌鐜板湪锛屾垨瀵圭幇鍦ㄩ犳垚鐨勫奖鍝嶏紝鍙兘鎸佺画鍙戠敓涓嬪幓銆傚湪鑻辫鏃舵涓紝鈥...
绛旓細already锛堣偗瀹氾級yet锛堝惁瀹/ 鐤戦棶锛塲ust, before, recently, still, lately, never, ever, never, twiceon several occasionin the past/ last few days/ weeks/ months/ years(up to) these few days/ weeks/ months/ yearsthis morning/ week/ month/ yearup to present/ nowso fartill now...
绛旓細鈽呬竴鑸幇鍦ㄦ椂:often, usually, always, sometimes, never, seldom, every week/day/year/month..., once a week, on Sundays 鈽呬竴鑸繃鍘绘椂锛歛go, yesterday, the day before yesterday, last week/year/night/month..., in 1989, just now, at the age of five, one day, ago, long ago,...
