senior high school English1.什么情况用have什么情况用have been?a lot of factories____have been set up对 have set up错set up 好像是点动词词组吧.怎能用been?2.their duty is to__their country against foreign enemies's attacks.A def

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senior high school English1.什么情况用have什么情况用have been?a lot of factories____have been set up对 have set up错set up 好像是点动词词组吧.怎能用been?2.their duty is to__their country against foreign enemies's attacks.A def
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senior high school English1.什么情况用have什么情况用have been?a lot of factories____have been set up对 have set up错set up 好像是点动词词组吧.怎能用been?2.their duty is to__their country against foreign enemies's attacks.A def
senior high school English
1.什么情况用have什么情况用have been?
a lot of factories____
have been set up对 have set up错
set up 好像是点动词词组吧.怎能用been?
2.their duty is to__their country against foreign enemies's attacks.
A defeat B defend 咋选B
3.Coal was formed out of dead forests by chemical__.
A processes B product 咋选A

senior high school English1.什么情况用have什么情况用have been?a lot of factories____have been set up对 have set up错set up 好像是点动词词组吧.怎能用been?2.their duty is to__their country against foreign enemies's attacks.A def
factories与set up 构成谓宾关系
意思就是 要用被动语态
完成时的被动语态就是have/has been done
不能完全靠中文意思来理解的
defeat击败,战胜；使…失败；挫败的意思
defend防护；辩护 保护的意思
可以从意思上理解
还有就是 defeat 不与against连用的
processes复数时是加工；处理的意思（process的第三人称单数形式）
chemical process指特定的化学反应过程
chemical product指化学产品

senior high school senior high school senior high school Senior High school senior 和high senior 跟high senior high school 还是 high school Senior High与Senior High School啥区别 Senior high school和 high school 有什么区别? 求作文- -my senior high school life I am a senior high school students. Demon Pretence Senior High School 的意思 Junior high school 、Middle School ；Senior High School、High School区别 senior school与high school有什么区别? junior high school middle school high school senior school 的区别 senior school students 和senior high school students有什么区别 英语中有没有senior middle school这个说法,高中不是senior high school吗? what do you think a senior high school中文意思？ 改错At presently I am a senior high school student My mother is a senior high school English teacher. l.ll be a senior high school student翻译