第三册：培养技能 · 全册易错点 · 第1–21课
本册介绍 · 全册课程目录 · 全册语法总结 · 全册单词总结 · 全册短语与句型 · 全册易错点 · 综合复习与自测
第三册：培养技能 · 全册易错点
本册介绍 · 全册课程目录 · 全册语法总结 · 全册单词总结 · 全册短语与句型 · 全册易错点 · 综合复习与自测
L1 · 定语从句与证据限定
The tracks that appeared overnight 中 that 作主语，不能删；The tracks that we photographed 中 that 作宾语，可以删。
对照例句： The tracks that we found near the gate may belong to a large dog.
that we found near the gate 修饰 tracks，that 作 found 的宾语；may 表示不确定推测。
L2 · 过去进行时与突发事件
I was knowing the answer 不适合表达当时知道答案，应写 I knew the answer；进行时强调过程而非单纯过去时间。
对照例句： I was checking the clock when a loose screw fell onto the floor.
was checking 提供背景，fell 引入一个短暂的新事件；when 连接两者。
L3 · 过去完成时的时间参照
Ancient builders had built it in 900 若没有另一个过去参照点，通常写 built 更直接；古老不等于过去完成。
对照例句： By the time the team reached the chamber, water had damaged several paintings.
reached 是过去参照点；had damaged 把损坏放在到达之前；by the time 表示到那个时间为止。
L4 · used to 与过去习惯
I am used to work early 应改为 I am used to working early；若说过去早上班，则是 I used to work early。
对照例句： Leo used to hide his work clothes, but now he talks openly about his job.
used to hide 表示已改变的习惯；but now 与前半句构成明确时间对比。
L5 · 间接疑问句的陈述语序
The editor asked how many households had the survey covered 错在保留问句倒装，间接疑问从句要恢复陈述语序。
对照例句： The editor asked how many households the survey had covered.
how many households 为 covered 的宾语，the survey 为主语；had covered 表示调查在询问之前已进行。
L6 · 一般过去时的被动语态
The accident was happened 不成立，因为 happen 不带直接宾语；应写 The accident happened。
对照例句： Two display cases were damaged before the alarm was raised.
were damaged 与 was raised 均为过去时被动；cases 为复数，alarm 为单数。
L7 · 可数与不可数名词
many money 应为 much money 或 a lot of money；many banknotes 则正确，因为 banknote 可数。
对照例句： Several fragments were missing, but most of the printed number was still visible.
several fragments 为复数；most of the printed number 指单个号码的部分，谓语用 was。
L8 · 地点介词与移动路径
across the forest 强调横穿整个林区，through the forest 强调在林中穿行；路线视角不同，不宜机械判为同义。
对照例句： A narrow path runs through the forest and ends at the old gate.
through 描述穿过内部空间，at 把大门作为终点；runs 与 ends 共用单数主语 path。
L9 · 比较级与比较对象一致
very faster 应改为 much faster 或 a little faster；very fast 则是原级搭配。
对照例句： The second ramp was slightly steeper than the first, so the cart moved faster.
slightly 修饰 steeper，than the first 省略 ramp；faster 在此修饰 moved。
L10 · 过去反事实条件句
If they would have heard the alarm 不符合此处标准反事实条件结构，应写 If they had heard the alarm。
对照例句： If the crew had received the warning earlier, they might have changed course.
had received 假设过去条件，might have changed 表示可能而非必然的不同结果。
L11 · 转述要求与否定命令
He told me don't touch it 应改为 He told me not to touch it；保留直接引语时则需引号和相应标点。
对照例句： The officer asked me to place the sealed box on the counter.
asked 为谓语，me 为宾语，to place 为宾语补足语；执行 place 的人是 me。
L12 · 第二条件句的假设距离
If I would live there 混淆条件与结果；通常写 If I lived there, I would ...。
对照例句： If I lived on a remote island, I would choose a reliable radio over a television.
lived 表假设而非实际过去；would choose 是设想的选择；over 表示优先于。
L13 · 强调句的焦点
It was yesterday when he called 不宜作为本课标准强调句答案；强调时间用 It was yesterday that he called。
对照例句： It was the gardener's voice that finally reassured the visitor.
It was ... that 强调主语 the gardener's voice；还原为 The gardener's voice finally reassured the visitor。
L14 · although 与 despite
Despite he helped us 结构不完整，应为 Despite helping us 或 Although he helped us。
对照例句： Although the businessman funded a clinic, his illegal methods still harmed the community.
although 从句承认善举，主句保留对手段的评价；still 强化让步关系。
L15 · 数量修饰语与 worth
a two-minutes repair 错把复合修饰语中的单位写成复数；two minutes of repair work 则可用复数。
对照例句： A two-minute repair saved a toy worth only three pounds.
two-minute 修饰 repair，minute 不用复数；worth only three pounds 后置修饰 toy。
L16 · one、it 与名词替代
I lost my pen and bought it 表示买回同一支笔；若买了一支替代品，应写 bought a new one。
对照例句： Of the two lambs, the one with a dark ear belonged to our neighbour.
the one 替代 lamb，with a dark ear 限定具体是哪一只；belonged 的主语仍为单数。
L17 · 最高级的范围与倍数
one of the longest bridge 应为 one of the longest bridges；比较集合必须由复数名词表示。
对照例句： The new footbridge is twice as long as the wooden one it replaced.
twice as long as 表示明确倍数；one 替代 footbridge；it replaced 为省略宾语关系词的定语从句。
L18 · 感官动词后的补语
We saw the panel to move 在主动感官结构中多了 to；应写 move 或 moving，取决于观察视角。
对照例句： We watched the metal rings rotating while a low tone filled the room.
watched 加宾语 the metal rings 和 rotating，呈现观看中的持续动作；while 连接同时背景。
L19 · have 加宾语加过去分词
He had his wallet stolen 通常表示钱包被偷的遭遇，不能仅凭 had 就翻译为“他请人偷钱包”。
对照例句： After the gate broke, we had a new lock fitted to keep the dog safely inside.
had 为一般过去时，a new lock 是宾语，fitted 是过去分词补语；to keep 表目的。
L20 · 过去将来时与计划结果
He was going to fly at dawn 不保证他确实起飞；如果天气取消计划，原句仍然可以成立。
对照例句： The pilot believed that the lighter engine would extend the aircraft's range.
believed 建立过去视点；would extend 指相对于相信时刻尚未发生的预期。
L21 · 完成时不定式的先后关系
He seems to won 不成立；强调此前获胜应写 seems to have won，描述经常获胜则可用 seems to win。
对照例句： The retired athlete appears to have inspired a new generation of coaches.
appears 为现在判断，to have inspired 指此前发生并留下影响的行为。
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