since后面什么时候跟完成时态，什么时候用过去时态？ for+一段时间 究竟什么时候用一般过去时，什么时候用完成时...
since\u540e\u9762\u4ec0\u4e48\u65f6\u5019\u8ddf\u5b8c\u6210\u65f6\u6001\uff0c\u4ec0\u4e48\u65f6\u5019\u7528\u8fc7\u53bb\u65f6\u6001\uff1fsince+\u65f6\u95f4\u70b9\uff0c\u4e00\u822c\u7528\u5728\u5b8c\u6210\u65f6\u6001\u53e5\u5b50\u4e2d\u3002for+\u65f6\u95f4\u6bb5\uff0c\u7528\u5728\u5b8c\u6210\u65f6\u6001\u6216\u8005\u8fc7\u53bb\u65f6\u6001\u53e5\u5b50\u4e2d\u3002eg:\u6211\u5b66\u82f1\u8bed\u4e24\u5e74\u4e86i
have
studied
english
for
2
years.i
have
studied
english
since
2
years
ago.\u81ea\u4ece\u4e24\u5e74\u4e4b\u524d\u6211\u5c31\u5f00\u59cb\u5b66\u82f1\u8bed\u4e86\u3002i
watched
tv
for
two
hours
last
night.\u6211\u6628\u665a\u770b\u4e86\u4e24\u4e2a\u5c0f\u65f6\u7684\u7535\u89c6\u3002
since+\u65f6\u95f4\u70b9\uff0c\u4e00\u822c\u7528\u5728\u5b8c\u6210\u65f6\u6001\u53e5\u5b50\u4e2d\u3002for+\u65f6\u95f4\u6bb5\uff0c\u7528\u5728\u5b8c\u6210\u65f6\u6001\u6216\u8005\u8fc7\u53bb\u65f6\u6001\u53e5\u5b50\u4e2d\u3002eg:\u6211\u5b66\u82f1\u8bed\u4e24\u5e74\u4e86I have studied English for 2 years.I have studied English since 2 years ago.\u81ea\u4ece\u4e24\u5e74\u4e4b\u524d\u6211\u5c31\u5f00\u59cb\u5b66\u82f1\u8bed\u4e86\u3002I watched TV for two hours last night.\u6211\u6628\u665a\u770b\u4e86\u4e24\u4e2a\u5c0f\u65f6\u7684\u7535\u89c6\u3002
1、since +过去一个时间点 (如具体的年、月、日期、钟点、1980, last month, half past six)。I have been here since 1989.
2、since +一段时间+ ago
I have been here since five months ago.
3、since +从句
Great changes have taken place since you left.（跟一般过去时）
Considerable time has elapsed since we have been here.（现在完成时）
4、It is +一段时间+ since从句
It is two years since I became a postgraduate student.（跟一般过去时）
绛旓細since鍚庨潰鍔鏃堕棿鐐,琛ㄧず鐜板湪瀹屾垚鏃銆備緥鍙ワ細He has been in Beijing since 2000.鑷粠2000骞翠粬灏卞幓鍖椾含浜嗐傞渶瑕佹敞鎰忕殑鏄紝since鎵杩炴帴鐨勬椂闂寸偣蹇呴』閮芥槸杩囧幓鐨勬椂闂达紝濡備笂杩板彞涓紝ten years ago 鍜2000 閮藉睘浜庤繃鍘荤殑鏃堕棿鐐广傝瘝姹囪В鏋愶細since 鑻辨枃鍙戦煶锛 [sɪns]涓枃閲婁箟锛歱rep.鑷︿互鍚;浠庘︿互鏉;...
绛旓細since涔嬪悗甯告帴鍚嶈瘝銆佸姩鍚嶈瘝浣滃叾瀹捐锛宻ince then鎰忎负鈥滀粠閭ｄ互鍚庘濄俿ince寮曞鏃堕棿鐘惰浠庡彞鏃讹紝鑻ヤ富鍙ヨ〃绀虹洰鍓嶇殑鐘跺喌鏄敱浜庤繃鍘绘煇涓浠朵簨鎵閫犳垚鐨勫悗鏋滄垨褰卞搷鏃,鍏惰皳璇姩璇嶄篃鍙互鐢ㄤ竴鑸幇鍦ㄦ椂锛涙湁鏃跺锛岄氳繃涓婁笅鏂囷紝鍙互鐪嬪嚭浠庡彞鐨勫姩浣滄槸寤剁画鍒拌繃鍘绘煇涓椂闂,杩欐椂涓诲彞鐨勮皳璇姩璇嶈鐢ㄨ繃鍘瀹屾垚鏃锛涘鏋滀富鍙ョ殑鍔ㄤ綔...
绛旓細1銆since寮曞鏃堕棿鐘惰浠庡彞鏃讹紝浠庡彞鍔ㄨ瘝閫氬父鐢ㄤ竴鑸繃鍘绘椂锛屼富鍙ュ姩璇嶇敤鐜板湪瀹屾垚鏃銆2銆乻ince浠庡彞涓紝鏈夋椂涔熺敤鍔ㄨ瘝鐨勭幇鍦ㄥ畬鎴愭椂鎯呭喌锛屼絾浠庡彞鎰忎箟灏辫捣浜嗗彉鍖栥3銆乻ince鏃㈠彲浠ュ紩瀵兼椂闂寸姸璇粠鍙ヤ篃鍙互寮曞鍘熷洜鐘惰浠庡彞锛屽師鍥犵姸璇粠鍙ュ鏃舵佹病鏈夌壒娈婅姹傘傛椂闂寸姸璇粠鍙ワ細涓昏鐜板湪瀹屾垚鏃讹紝浠庡彞涓鑸繃鍘绘椂銆備緥锛欼t has...
绛旓細鐜颁唬瀹屾垚鏃 since
绛旓細涓烘偍瑙ｇ瓟濡傛灉浠庡彞鐨勪簨浠朵粠杩囧幓鏌愪竴鏃跺埢寮濮嬪彂鐢燂紝涓鐩村欢缁埌鐜板湪锛屽鏋滄斁鍒since浠庡彞褰撲腑鐨勮瘽锛岄偅涔堣繖涓粠鍙ュ綋涓浣跨敤鐜板湪瀹屾垚鏃銆傚鏋滀綘浠ヨ繃鍘绘煇涓涓簨浠跺彂鐢熺殑鏃堕棿锛屼綔涓轰綘闄堣堪鐨勬椂闂磋捣鐐癸紝浠ョ幇鍦ㄤ綔涓轰綘闄堣堪鐨勬椂闂存埅姝㈢偣锛岄偅涔堜綘灏卞彲浠ュ湪since浠庡彞褰撲腑浣跨敤涓鑸繃鍘绘椂銆傝繖閲屾槑鏄惧濮绘槸鎸佺画瀛樺湪鍒扮幇鍦ㄧ殑锛屾墍浠...
绛旓細杩欐槸鎴戠殑鏁欐锛屼緵浣犲弬鑰冿細since鐨勭敤娉曪細璇戜綔鈥滆嚜浠庘︿互鏉モ(1)鎺鏃堕棿鐐癸細濡 I have stayed in that country since 1995. 瑕佹眰锛氳皳v.鐢ㄧ幇鍦瀹屾垚鏃锛岃屼笖椤绘槸寤剁画鎬у姩璇嶃(2)鎺ヤ竴娈垫椂闂 + ago锛氬 They have lived in that house since two years ago. 瑕佹眰锛氳皳v.鐢ㄧ幇鍦ㄥ畬鎴愭椂锛岃屼笖椤绘槸寤剁画...
绛旓細鍙互鐢 for 鍜 since 鏉ュ洖绛旓紝渚嬪锛1. For six years.宸茬粡璁よ瘑鍏勾浜嗐2. Since I was twelve.浠庢垜12宀佸紑濮嬪氨璁よ瘑浜嗐傚洓銆佷袱鑰呯殑鍖哄埆 1銆佸湪涓庣幇鍦瀹屾垚鏃杩炵敤鏃讹紝for 鍚庨潰鎺ヤ竴涓鏃堕棿娈碉紝鑰 since 鎺ョ殑鏄竴涓椂闂寸偣銆2銆佸湪涓庣幇鍦ㄥ畬鎴愭椂杩炵敤鏃讹紝since 浣滆繛璇嶆椂锛屽悗闈㈢殑浠庡彞涓鑸敤涓鑸繃鍘绘椂锛...
绛旓細涓嶆槸寰堢粷瀵逛絾澶ч儴鍒嗘儏鍐垫槸鍜屽畬鎴愭椂鎬佽繛鐢ㄣ備富瑕佺湅since鍦ㄥ彞瀛愬仛浠涔鎴愬垎锛屽疄闄呮剰涔夈傚叾瀹瀞ince鐨勪富瑕佹槸瑕佹噦寰楀拰ago鍖哄垎寮鏉ワ紝涔熷氨鏄竴鑸繃鍘鏃朵笌鐜板湪瀹屾垚鏃剁殑鍖哄埆銆傚畬鎴愭椂寮鸿皟鐨勬槸涓娈鏃堕棿鐨勪簨鎯咃紝鎴栨煇涓姩浣滃杩囧幓鎴栨槸鐜板湪閫犳垚浜嗕竴瀹氱殑褰卞搷銆備竴鑸繃鍘绘椂寮鸿皟鐨勬槸杩囧幓鐨勬煇涓椂闂寸偣銆1銆乻ince鍦ㄥ彞瀛愬仛浠嬭瘝...
绛旓細has been have been left澶ф鏄叡鐨勶紵since鏄墍鏈変竴鑸紡鐨勬爣蹇楁ц瘝璇
绛旓細I have given up smoking ever since I caught a bad cough.Lily has stayed at home since she left school.
