问题 in the need to do sth 的理解

These firms have been given a tough lesson in the need to diversify their markets.请问红色部分怎么理解？

问题 in the 1980s中的1980s是复数吗

在 in the 1980s（在20世纪80年代）这类用法中，1980s是一种复数吗？有人说它是复数，但我觉得它不能算是复数吧，因为 1980s 并不表示很多个 1980。如果说它是一种复数，有相关的依据吗？

问题 in front of 和 in the front of 在用法上有什么区别

—Where is he？—He's sitting ________ of the classroom and doing his homework.A.in frontB.in a frontC.in the frontD.on front

问题 定语从句介词+which时的语序问题

看到一种说法，就是The river of which the banks are covered with trees flows to the sea 和 The river the banks of which are covered with trees flows to the sea 这两种语序都是正确的，不太能理解，请问下面这句：A frequent result of injuries sustained in falls is long-te...

话题 31 the trial of Roser West

话题 play the drums的单复数问题

问题 through用法疑惑

Attach the bait to the end of the fishing rod and then through the line into the ocean and wait patiently.请问老师：这个句子是否正确？看不懂介词 through 的用法？还是应该是动词 threw？

话题 the rest 作主语时的主谓一致

问题 with复合结构作什么成分

Very few writers on the subject have explored this distinction—indeed, contradiction—which goes to the heart of what is wrong with the campaign to put computers in the classroom.请问 with the campaign to put computers in the classroom 是属于 of 的宾语的一部分吗？它在宾语中做...

问题 by的用法(by the passage of time)

Assignments are thus felt to be given added weight by the passage of time.句中 by 是随着随着时间的流逝的意思吗？

问题 句子成分

The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century.想...

问题 a third man 和 the third man 区分含义

Then a third man left.Then the third man left.这个究竟含义理解上有什么不同啊？

问题 the following month前面为什么不加介词in

老师，这个the following month前面为什么不加一个介词in哇？

问题 主系表结构的倒装

...构可以倒装。但是表示被动饿也叫主系表结构吗？比如:the picture is fixed on the wall可以说成fixed on the wall is the picture.但是前面那个is是助动词，不是主系表结构呀，后面却是系动词，这怎么解释？这两个句子是相通的吗？ 3.过去分...

问题 to cook（主动） 还是 to be cooked（被动）

Also note that, conventional ovens heat the food from outside in.Hence, the outer surface of the the food is exposed to heat for a longer time, thus causing the food to cook unevenly.在causing the food to cook中：1）cook是vt还是vi? 因为柯林斯词典显示cook vt或vi均可。2)  为...