B5U4
一、重点单词、词组
1. Involve 动词，涉及，包含，使参与。例句：He was involved in a meeting.
2. Delighted 形容词，高兴的，快乐的。拓展：delight 动词/名词，使高兴，快乐。
3. Unusual 形容词，不寻常的，独特的。例句：It's unusual for her to start late.
4. Assist 动词，帮助，协助。辨析：assist, help, aid 都有帮助之意，但侧重点不同。
5. Eager 形容词，渴望的，热切的。例句：They are eager to know the outcome.
6. Concentrate 动词/名词，集中（注意力、思想）。辨析：concentrate, focus 都指集中，但侧重点不同。
7. Assess 动词，评估，评定。拓展：assessment 评估。
8. Inform 动词，告诉，通知。例句：Did you inform them of the progress of the work?
9. Depend on/upon 依赖。注：depend on 后不能直接接宾语从句，需先接形式宾语。
10. Case 名词，[c] 情况，病例，案例。例句：in no/any case 绝不/不管怎样。
11. So as to (do)… 为了做…。例句：We hurried so as not to be late for class.
12. Deny 动词，否认，否定。例句：He denied the accusation.
13. Demand 动词/名词，要求。例句：He demanded that we leave immediately.
14. Gifted 形容词，有天赋的。例句：He is gifted at music.
15. Ahead of 在…前面。拓展：ahead of time/schedule 提前。
16. Accurate 形容词，精确的。辨析：accurate, correct, exact 的区别。
17. Appointment 名词，约会。例句：I have an appointment with them in the evening.
二、重点句型
As作连词的用法小结：
(具体用法及例句如上文所述)
2. Have a good nose for 对…有敏锐的嗅觉。拓展：have an eye for 对…有鉴赏力。