在贝赛思英文ELA学习中，有个很重要的概念，叫「Context Clue」——words or phrases around the word that help you understand the word's meaning. 简单来说，这是一项阅读技能，孩子遇到生词时，利用周围的语言信号，来推测出词义。很多家长可能都听过Context Clue这个词，但往往会简单地理解成联系上下文。第一，Context Clue不能笼统、简单地概括成联系上下文，它有一套很具体的分析方法（下文详解）。在MAP，SAT等考试中，大概70%的词汇题解法都要靠Context Clue。第二，Context Clue是对句子内部逻辑和前后文信息进行的有效梳理。第三，孩子掌握了Context Clue技巧，平时阅读能够保障流畅度，同时潜移默化地积累更多词汇，比死记硬背单词更轻松。
以下是Context Clue最常见的5种类型。
1. 推断型线索Inference Clues
无明确信号，靠整句话的逻辑和常识推理。
The torrential rain caused the river to overflow, flooding the nearby streets.
线索：overflow / flooding 是结果 → 反推原因，torrential=倾盆的/湍急的
2. 定义型线索Definition Clues
信号词：is, means, refers to, that is
An arboreal animal, which lives in trees, includes monkeys and squirrels.
线索：which lives in trees 直接给出解释 → arboreal=树栖的
3. 例子型线索Example Clues
信号词：such as, for example, for instance, including, like, e.g
The nocturnal animals, including owls, bats, and raccoons, wake up only after dark.
线索：including后面举例了猫头鹰、蝙蝠、浣熊，显然nocturnal=夜行性的
4. 反义型线索Antonym Clues
信号词：unlike, but, however, although, instead of
Unlike his gregarious sister who loves parties, Tom is reticent and stays alone.
线索：unlike 对比 → gregarious=爱交际的，reticent=沉默寡言的
5. 同义型线索Synonym Clues
信号词：that is, in other words, or，以及逗号隔开的近义表述
The dessert was delectable, so delicious that we finished it in seconds.
线索：delicious → delectable=美味的
上述例子为了方便示例理解，比较简单，接下来我们看两道MAP真题（G5）。
真题一
Read the passage.
David strapped on his helmet and climbed onto his bike to wait for his dad. David and his family had moved to the neighborhood only last week, and he had not yet had a chance to explore. However, he knew there was a great bike path somewhere not too far away. Today, he and his dad were going to go find that path. It would be an adventure! Dad strolled out of the garage, walking his bike beside him, and joined David. They coasted down the steep driveway, turned left, and began to maneuver through the neighborhood.
Move the word that has the same meaning as maneuver into the box.
A. design B. exercise C. navigate D. organize
详细解析
学生不需要知道maneuver的确切意思，只需要看它所在的句子：“They coasted down the steep driveway, turned left, and began to maneuver through the neighborhood.”（他们顺着陡峭的车道滑下，左转，然后开始在社区里maneuver）。前面的动作是“滑下”、“左转”，都是骑自行车时的移动动作。因此maneuver在这里也必然是一个表示“移动/寻找路线”的词。对比选项，design设计、exercise锻炼、organize组织，都不符合骑车的语境，只有navigate（导航/穿行）符合前后文的逻辑动作。
真题二
Read the passage.
Sandra wanted to become a carpenter so she could build and repair homes and other buildings. But Sandra had no experience as a carpenter. She took classes to learn about carpentry. She also became an apprentice for Mr. Jones, who had been a carpenter for 25 years. Mr. Jones helped teach Sandra how to do carpenter's work. Sandra worked with Mr. Jones for six months. Then, she took a test to see if she had learned all the carpentry skills. She passed the test. Now Sandra is a carpenter just like Mr. Jones.
Based on the information in the passage, what is an apprentice?
A. a person who has experience doing a job
B. a person who teaches another person important skills
C. a person who builds and repairs homes and other buildings
D. a person who learns a job by working with an experienced person
详细解析
文章提到Sandra没有经验，所以她去上课，“She also became an apprentice for Mr. Jones, who had been a carpenter for 25 years. Mr. Jones helped teach Sandra how to do carpenter's work.” 后一句话其实是对apprentice这个身份的直接解释：Mr. Jones是个有25年经验的老木匠，他教Sandra做木工活。通过“teach Sandra”和“worked with Mr. Jones”这两个关键信息，回到选项中，就能推断出apprentice是指“通过跟着有经验的人工作来学习一份职业的人”。
综上，Context Clue对贝赛思孩子来说是一项非常重要的核心能力，这个概念听起来简单，但在实际运用中并不容易。
