At the start of this “Cancer Crusade,” researchers were already tackling some tough questions……问were already tackling 为什么要用过去进行时,还有加个already,为啥不用过去完成时或一般过去时;还有tackle不是阻止

At the start of this “Cancer Crusade,” researchers were already tackling some tough questions……问were already tackling 为什么要用过去进行时,还有加个already,为啥不用过去完成时或一般过去时;还有tackle不是阻止
At the start of this “Cancer Crusade,” researchers were already tackling some tough questions……问were already tackling 为什么要用过去进行时,还有加个already,为啥不用过去完成时或一般过去时;还有tackle不是阻止的意思吗?怎么在这儿变解决了?

At the start of this “Cancer Crusade,” researchers were already tackling some tough questions……问were already tackling 为什么要用过去进行时,还有加个already,为啥不用过去完成时或一般过去时;还有tackle不是阻止
这应该怪咱们中国人学的语法太古板,already并没有要求一定要用于完成时,而在这个句子里强调的是at the start of this .是强调那个过程,所以用了过去进行时.tackle的意思很多,你只知道一个是不够的,其实阻止是个行动概念,解决是意识上的,应该是一样的,问题被解决了也就相当于被阻止了.同时tackle 还可以作为名词使用,比如渔具、滑轮等.遇到一个词应该查询字典,会发现很多更有趣的使用方法,英语学习就会变得更有意义.

人家用过去进行时表示已经解决了部分癌症问题， 并没有完全解决。进行时有一段时间里干什么的含义， 所以这里理解为在过去一段时间里已经解决了部分问题。 再有根据我们的常识， 各种癌症问题还没有完全的攻克。
tackle
n. 滑车；装备；用具；扭倒
vi. 扭倒；拦截抢球
vt. 处理；解决；抓住；固定；与…交涉...

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人家用过去进行时表示已经解决了部分癌症问题， 并没有完全解决。进行时有一段时间里干什么的含义， 所以这里理解为在过去一段时间里已经解决了部分问题。 再有根据我们的常识， 各种癌症问题还没有完全的攻克。
tackle
n. 滑车；装备；用具；扭倒
vi. 扭倒；拦截抢球
vt. 处理；解决；抓住；固定；与…交涉

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那个时候正在解决，还没有解决完

and the students 第一个单词后加among
Some college teachers think that students shouldn't have a boyfriend or a girlfriend in school because it will effect their study 中a boyfriend or a girlfriend 改为复数 还有...

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and the students 第一个单词后加among
Some college teachers think that students shouldn't have a boyfriend or a girlfriend in school because it will effect their study 中a boyfriend or a girlfriend 改为复数 还有effect改为affect
So it goes without saying that students shouldn't have a boyfriend or a girlfriend in school.这句话与上一句之间逻辑性不强，连接太突兀，之前应多做解释
However,the college students hold the idea that it isn't a good thing that the teachers are against the love between the students
这句话太繁琐
have a love
talk with his love 表达欠佳
it is different his friends and parents 这句错误
So there is no-doubt that the teachers are against the students in love. 其中no-doubt 用在这里意思不对
……
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