九下英语11单元单词

1. 单词的拼写和发音。对于每个单词，学生需要掌握它的正确拼写和发音，这样才能确保他们在日常生活中正确地使用单词。例如:

- Vaccine (疫苗)：The vaccine has been proven to be effective against the virus.

- Compulsory (强制性的)：Math and English are compulsory subjects in many schools.

- Reservoir (水库)：The reservoir provides drinking water for the whole city.

- Pneumonia ()：He was hospitalized with pneumonia last month.

- Allergic (过敏的)：She is allergic to peanuts and can't eat anything containing them.

2. 单词的意义和用法。单词不仅是一段音符的组合，还包含了意义和用法。学生需要理解每个单词的含义和在语境中的使用方法，这样才能运用自如。例如:

- Campaign (活动)：The charity launched a campaign to raise money for the homeless.

- Quarantine (隔离)：The travelers were placed in quarantine for two weeks upon arrival.

- Symptom (症状)：One of the symptoms of COVID-19 is loss of taste and smell.

- Immunize (免疫)：Children are immunized against several diseases before they start school.

- Epidemic (流行病)：The government declared a state of emergency due to the epidemic.

3. 单词的词性和构词法。学生需要知道每个单词的词性(名词、动词、形容词等)和构词法(前缀、后缀等)，这样才能更好地理解它们的语法用法。例如:

- Revive (v. 复苏)：He tried to revive the dying plant by watering it.

- Achievement (n. 成就)：Winning the first prize was a great achievement for her.

- Accidentally (adv. 意外地)：I accidentally spilled my coffee on the table.

- Unpredictable (adj. 不可的)：The weather in spring is often unpredictable.

- Disadvantageous (adj. 不利的)：The new policy is disadvantageous to small businesses.

例句：

- I got my flu vaccine last week.

- Attendance at the meeting is compulsory for all staff members.

- The reservoir is almost empty due to the drought.

- He was diagnosed with pneumonia after experiencing chest pain.

- She had a severe allergic reaction to the seafood she ate.

- The campaign aims to raise awareness of climate change.

- All travelers arriving from abroad must undergo a mandatory quarantine.

- One of the symptoms of depression is a loss of interest in activities.

- Children should be immunized against measles, mumps, and rubella.

- The country is facing an epidemic of obesity.

- He tried to revive their friendship by reaching out to her.

- Winning the award was a great achievement for the team.

- She accidentally deleted all her files from the computer.

- The weather forecast for the weekend is unpredictable.

- The new tax policy is disadvantageous to low-income families.