高三英语知识点总结.docx

高三英语知识点总结
一、不定式做主语：
1、不定式做主语一般表示详细的某次动作。===动名词doing 表示****惯的，常常的动作。
: To finish the building in a monend me his pen.
We hope to get there before dark.
The girl decided to do it herself.
高三英语学问点总结2
语法----被动语态
(一)概念：主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
(二)各种时态被动语态的形式
am/is/are + done
was/were + done
⑴will/shall be done ⑵be going to be done ⑶be to be done


is/am/are + being + done
表示说话人说话时或现阶段正在进展的动作，常常和时间副词now (现在), right now (现在, 此刻), at present (现在,目前), at this moment (此刻)连用。
have/has been done
现在完成时常与already, always, often, ever, never, yet, not...yet, just等不表示明确的时间副词连用, 还可以和表示时间始终连续到目前的带(ever )since, for的状语及包括现在在内的词连用。如: now, today, this month, this year, recently, these days，many times, so far, by now, in the past/last few days/years… 等。
6. 过去完成时的被动 had been done
7. 过去将来时的被动 would be done
8. 过去进展时的被动 was/were being done
9. 带情态动词的被动语态 情态动词 + be done
10. 动词不定式的被动式 to be done
高三英语学问点总结3
1. decrease削减,降低 decrease by 削减了decrease to削减到 increase by/to增加了/到
2. endangered animals濒临危急的动物 in danger of有?的危急;垂危out of danger脱离危急


3. die out 渐渐消逝，灭亡(