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问题 in的词性和用法

...ew technologies, where in a handful of well-established corporations sell highly specialized devices for business use and a fast-growing number of start-up companies produce innovative toys, gadgets for hobbyists and other interesting...

问题 It...since从句 的问题

It _____ over 50 years since humans _____ first steps on the moon.A. is; have taken       B. has taken; tookC. has taken; take刚才看了老师们之前针对这类问题进行的讲解，感觉A和B都行请问正确答案应该是哪一个？为什么？句子该怎么翻译？

问题 关于since的用法

...Listen,’ a promise that she had done gay, exciting things just a while since and that there were gay, exciting things hovering in the next hour.请问专家老师们，since在这里作为副词“...之后”讲好像说不通，若是介词那么后边的成分是被省略掉了吗？

问题 to the extent和to the extent that在句中的用法

...r Technology has been provided to the University, and (ii) any individuals performing work on behalf of the Consultant under this Agreement are employees of the Consultant, and not independent contractors.这句话中的except to the extent是except to是一个短语还是to the extent是一个短...

问题 since后接短暂动词一般体和完成体的语意理解

Since he joined the army,he has been in much better health.此类句一般表示，从句提供从某个过去时间点到现在的一个时间框架，主句开始发生于此时间框架内的一个模糊时间点。教辅书中提到此句有暗含的语意(他可能现在仍在军队里，也可...

问题 定语从句关系词的指代问题

老师您好。您之前回答过我的关于since when的那个问题。在那个问题中您说which只是替换指示代词（this ,that）或者是人称代词(it)。然后我现在有了新的一个小问题。就是把定语从句变成两个简单句的话，后面简单句中是用this that ...

问题 辨析：since when与when…since（since的位置）

下面的正误句看不懂：他从什么时候开始留胡子的?正：Since when has he had a beard? 误：When has he had a beard since? 请专家老师分析和指导，谢谢！

问题 since后接终止性动词与持续性动词的含义区别

关于since引导的从句，我看到网上有这么一种说法（附后），即：（1）若后接的是终止性动词过去式，按“从动词发生那一刻起”算；（2）若后接的是持续性动词过去式，为“持续性动词那一段时间结束起”算；（3）若接是持...

问题 句子分析

Of course, if he overrules me and says, “no, let’s do it my way,” then I owe him my full and enthusiastic support to make it work as best it can.曹老师，如您讲的as best sb can在语法上来讲是错误的: = the best that sb can; = as well as sb can.那么这里的that从句是什么...

问题 as Russia then was called做什么成分

...er of Nazi Germany, launched an attack against the Soviet Union, as Russia then was called. 请问 as Russia then was called 做什么成份？句子可不可以改成: In 1941, Adolf Hitler, leader of Nazi Germany, launched an attack against the Soviet Union which then was called Russia.&...

问题 since从句的理解与时态难点

The library ______for more than 60 years since it _____ in 1940. A. has been open; opened B. has been opened; opened C. has opened; was open D. has been open; was open 正确答案为A。但 D 为何不可以呢？有资料说，当 since 引导的状语从句的谓语动词是延续性...

问题 in what has是什么用法

No longer. The Internet-and pressure from funding agencies, who are questioning why commercial publishers are making money from government-funded research by restricting access to it- is making access to scientific results a reality. The Organization for Economic Co-operation and Development (OECD) ...

问题 为什么用了过去完成时I had not seen him

...eaking.    'Not at all,' I lied, 'but I'm going to the dentist.'    'Then I'll come with you,' he answered. 'There's always plenty to read in the waiting room!1) It was no use pretending that I had not seen him 为什么用了过去完成时I had not seen him？感觉用一般过去时也可...

问题 when, as, while, since的区别

_____ Tom waited for the exam result, he became less and less patient.  A. When    B. As      C. While   D. Since 答案为 B。请解释一下 when 与 as 的区别，谢谢！

问题 look forward to可以用于不好的事吗

...？He did not look forward to being in debt because his restaurant was no longer popular.句子来源：高中英语人教版必修三第二单元（Unit 2）。