第二册：实践与进步 · 全册易错点 · 第25–49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
L25 · 间接引语与视角转换
I asked where did it stop 错误；从句应为 where it stopped。
对照例句： I asked the driver where the bus stopped.
asked 带听者 the driver 和间接疑问从句；where 引导地点问题，从句不倒装。
L26 · 一般现在时与习惯
She is liking this style 在一般偏好语境下不自然；常用 She likes this style。
对照例句： My sister likes paintings with strong colours.
likes 表稳定偏好，paintings 是泛指复数，with strong colours 为后置修饰语。
L27 · 过去完成时与先后关系
had went 错误；had 后用过去分词 gone，不能用过去式 went。
对照例句： We had covered the bags before the rain started.
had covered 标记较早动作，before 从句 started 给出过去参照点；bags 是受保护的物品。
L28 · 动名词与动词搭配
Parking ... block 缺少第三人称单数词尾；一个动名词短语通常按单数看待。
对照例句： Parking beside this gate blocks the entrance.
Parking beside this gate 是动名词短语作主语，整体视为单数，谓语用 blocks。
L29 · 现在完成时与过去时间
has flew 错误，fly 的过去分词是 flown；本例 carry 的过去分词是 carried。
对照例句： The small plane has carried a hundred passengers this week.
has carried 是现在完成时，a hundred passengers 为累计宾语，this week 连接过去活动与现在。
L30 · 冠词与可数性
on the river 通常表示在河面上，into the river 强调从外面进入水中。
对照例句： A ball landed in the river beside our picnic spot.
A ball 首次引入对象，the river 是场景内可识别的河流，beside 短语修饰位置。
L31 · 一般现在时与习惯
used to repairing 把过去习惯与 be used to doing 混淆；此处应为 used to repair。
对照例句： Mina used to repair bicycles in her parents' garage.
used to 加原形 repair 表过去习惯，in 后为地点，parents' 是复数所有格。
L32 · 被动语态与信息重点
has found the receipt 是主动；receipt has found 缺少合理宾语且让收据成为发现者。
对照例句： The missing receipt has been found behind the counter.
receipt 是单数承受者，has been found 为完成时被动；behind the counter 说明发现地点。
L33 · 过去完成时与先后关系
had lost 不表示此后才丢；它把丢地图放在到岸之前。
对照例句： By the time we reached the shore, we had lost our map.
By the time 从句 reached 建立过去参照点，主句 had lost 回顾更早事件，our map 是宾语。
L34 · 间接引语与视角转换
police 通常作复数集合名词：The police are investigating，不用 is。
对照例句： The police told me that my bicycle had been found.
told me 引出接收信息的人；had been found 是从通知时刻回看更早找回动作的被动结构。
L35 · 不定式与目的
stop to run 是停下别的事去跑；stop running 是不再跑。
对照例句： A cyclist stopped to help the shop assistant.
stopped 是主线过去动作，to help 是目的状语，the shop assistant 为 help 的宾语。
L36 · 将来进行时与过程
will be swum 是被动形式，不表示她自己正在游；此处用 swimming。
对照例句： At noon tomorrow, Ava will be swimming near the eastern coast.
will be swimming 是将来进行时，At noon tomorrow 给出参照时点，near 表示附近而非已经上岸。
L37 · 被动语态与信息重点
The event will be taken place 错误；take place 本身是不及物表达。
对照例句： The new stadium will be opened in September.
stadium 是被开放的设施，will be opened 为将来被动，in September 表月份。
L38 · 过去完成时与先后关系
dream of live 错误，介词 of 后若接动词应为 living。
对照例句： Before he moved north, Joel had dreamed of a quiet village.
Before 从句 moved 给出过去参照，had dreamed 回顾更早的愿望；dream of 后接名词短语。
L39 · 间接引语与视角转换
asked whether could he leave 保留了直接问句倒装，应改为 whether he could leave。
对照例句： Evan asked the nurse whether he could leave that afternoon.
whether 引出是否问题，he could leave 为陈述语序；that afternoon 从转述者的视角定位时间。
L40 · 非真实条件句
If I would know 通常不能表达这种标准假设；用 If I knew。
对照例句： If I knew more about her work, I would ask better questions.
knew 表非真实现在假设，would ask 表假设结果；better 是 good 的比较级。
L41 · 情态动词的意义与形式
need not buy 是不必买，不能译成“不准买”；do not need to buy 也是不必买。
对照例句： You need not buy the hat just because it is fashionable.
need not 在此是情态用法，后接 buy 原形；because 从句说明不应成为唯一理由的因素。
L42 · 动词、宾语与补足语
watched the bird to move 不合此感官动词结构；主动式通常省略 to。
对照例句： We watched the bird move towards the musician's hand.
watched 后接宾语 the bird，再接原形 move 作宾语补足语；towards 标记方向。
L43 · 情态动词的意义与形式
managed landing 不符合常用搭配；用 managed to land。
对照例句： The pilot was able to land before the storm arrived.
was able to land 描述这次成功结果，before 从句限定时间，storm arrived 是之后的事件。
L44 · 真实条件句
If we will keep ... 在普通真实条件句中多余；用 If we keep。
对照例句： If we keep to the path, we can reach the village before dark.
if 从句用一般现在时 keep，主句 can reach 表条件下的能力或可能，before dark 为时间界限。
L45 · 被动语态与信息重点
money have been 应为 money has been；不可数名词按单数处理。
对照例句： The missing money has been returned in a plain envelope.
money 不可数，助动词用 has；has been returned 是完成时被动，in 表容器。
L46 · 数量表达与范围
fewer comfort 不对，comfort 通常不可数；可说 less comfort 或 fewer comfortable seats。
对照例句： The overnight train cost more but offered fewer comfortable seats.
cost 是过去式，与原形同形；more 省略比较中的 money，fewer 修饰可数复数 seats。
L47 · 间接引语与视角转换
evidence 通常不可数，不写 an evidence；可说 a piece of evidence。
对照例句： The cellar was said to be haunted, but no one had evidence.
was said to be 是被动报道结构；but no one had evidence 限定传闻可信度，不确认鬼魂存在。
L48 · 时间、原因与让步从句
while he removed the mirror 不一定等于拿开之后；表达紧接应使用 as soon as。
对照例句： As soon as the dentist removed the mirror, I asked a question.
As soon as 从句给出先发生的动作，主句 asked 紧接其后；两者都是具体过去事件。
L49 · 叙事中的时态与衔接
blowed 不是 blow 的标准过去式，应为 blew；blown 是过去分词。
对照例句： I was sleeping on the terrace when a gust blew my blanket away.
was sleeping 是背景，when 引出 blew；blow 的过去式为 blew，away 表离开原处。
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