Question

19．李華幫媽媽做完家務(wù)才開始復(fù)習(xí)功課．
Li Huadidn't begin going over the lesson until she helped her mother finish doingthe housework．

Answer 1

分析 didn't begin going over the lesson until she helped her mother finish doing．

解答 答案：didn't begin going over the lesson until she helped her mother finish doing．這里是說(shuō)過(guò)去的事情用一般過(guò)去時(shí)，這里表示直到…才用not…until…，主句是李華才開始復(fù)習(xí)功課，主語(yǔ)Li Hua，開始做某事用begin doing sth，復(fù)習(xí)功課go over the lesson，begin是實(shí)意動(dòng)詞借助于did構(gòu)成否定，故Li Hua didn't begin going over the lesson，until引導(dǎo)時(shí)間狀語(yǔ)從句，主語(yǔ)用she代替，幫助某人做某事用help sb do sth，他媽媽her mother，完成做某事finish doing sth，做家務(wù)do housework，故until she helped her mother finish doing，故答案是didn't begin going over the lesson until she helped her mother finish doing．

點(diǎn)評(píng) "not…until""意思是："直到…才…"表示在這個(gè)界限之前一直沒(méi)有發(fā)生這個(gè)動(dòng)作You can't leave until I come back．．直到我回來(lái)你才可以離開"until""意思是："直到…"表示這個(gè)動(dòng)作一直延續(xù)到這個(gè)界限出現(xiàn)時(shí)．   （易錯(cuò)點(diǎn)：將"not…until""句型翻譯成了否定句，如上句：直到我回來(lái)你不可以離開×）