Textbook publishers connect professors, instructors and students in
ways that alternatives, such as open e-textbooks and open educational
resources, simply do not.这是个什么句型,前半句理解,从alternatives往后就看不懂了。
...个知识点:如果虚拟条件从句中含有were,had或should,可以将if省略,而把这几个词放到主语之前,构成倒装结构。Should he come(=If he should come), tell him to come to my office.Were it necesary(=If it were necessary), I might go without delay.Had Jack recognized hi...
...做到一道有关虚拟语气的题目,答案是B,有些疑惑:Had the government offered the help, we couldn’t have couldn’t have
suffered a loss.A. ought not to have suffered B. couldn’t have suffered C. shouldn’t
suffer D. couldn’t suffer字典上ought to有这样一个解释:u...