求学的三个条件是：多观察，多吃苦，多研究。下面课件网小编为您推荐九年级上册英语复习知识点整理，希望对您有所帮助~
【知识点一】
Ⅰ、authorise（动词）授权、批准
authorisation（名词）授权、委任
authoritative（形容词）的、命令式的
authority（名词）权力、职权
authorities（名词）权力、职权
① Dr Li has authorised David to act for him in his absence.
② The Ministry for Finance authorised the payment of annual increments.
③ One needs special authorisation to enter such a building.
④ This news came from an authoritative source， so it must be reliable.
⑤ The Commander-in-chief spoke in an authoritative tone.
⑥ As a senior officer， Jason is entitled to have authority over the clerical staff.
⑦ Who gave you authority to implement the new salary scheme?
⑧ Dr Wong is an authority on language teaching.
⑨ The authorities concerned must see to it that the same thing will not recur.
【知识点二】
Ⅱ、clear（形容词）清楚的、明白的、无嫌疑的、债务已清的；
（副词）远离的
（动词）清除、解除。
clearance（名词）清除、许可（证）
（修饰语）清货
clearing （名词）林中空旷的
clearly（副词）清楚地
① The speaker's voice is clear enough to be heard.
② Can you make your last point clearer?
③ The suspect was clear of suspicion.
④ The gambler hopes to be clear of debts soon.
⑤ Unauthorised persons are advised to keep clear of the premises.
⑥ The police have cleared the road of obstruction.
⑦ If there exists misunderstanding among friends， please clear it up.
⑧ Have you seen any slum clearance?
⑨ The plane must get clearance for take-off.
⑩ Before Christmas， shopping centres have the habit of holding annual clearance sales.
