Question

12．他昨天把筆記中的難點(diǎn)盡可能多的挑選出來復(fù)習(xí)后才做作業(yè)．
Hedidn't do his homework until he picked out as many difficult points as possible in the notes and went over them yesterday．

Answer 1

分析 didn't do his homework until he picked out as many difficult points as possible in the notes and went over them．

解答 答案：didn't do his homework until he picked out as many difficult points as possible in the notes and went over them．這里是說過去的事情用一般過去時，表示直到…才，用not…until，做作業(yè)do his homework，do是實(shí)意動詞，借助于did構(gòu)成否定didn't，后加動詞原形，故didn't do his homework until，until引導(dǎo)時間狀語從句，主語he，挑選pick out，過去式picked out，盡可能多的難點(diǎn)as many difficult points as possible（as…as possible盡可能…）筆記中in the notes，and連詞，連接兩個對等成分，復(fù)習(xí)go over，后加賓語them，go的過去式是went，故答案是didn't do his homework until he picked out as many difficult points as possible in the notes and went over them．

點(diǎn)評 not…until指的是"直到…才"的意思，如 I did not go home until my mother called me．
我直到我媽媽打電話給我才回家．
當(dāng)Not until位于句首時，句子要倒裝．其結(jié)構(gòu)為：Not until+從句/表時間的詞+助動詞+（主句）主語+謂語+．如：
①Not until the teacher came in did the students stop talking．直到老師進(jìn)來學(xué)生們才停止講話．
②Not until next week will the sports meet be held．直到下周才開運(yùn)動會．