...ur basic alternatives.这里面I have been able to discover 我能够发现的。但这里面为什么不用I have discovered？用have been able to是表示当时做某事的“能力”吗？其结果对现在产生影响（discover终结短暂动词）。句2: They have been able to keep up cheer...
Can our planet afford to have any great thinkers
become discouraged and give up? It doesn’t take a genius to know the answer: absolutely
not.上面一段摘自2021年高考的全国甲卷（全国2卷）的阅读理解D。这里的动词 become 的主语呢？感觉句子结构不完整吧！
I heard a song on the radio. I ____ high and low at the music store, but I can't find it.A. searched B. have searched 请问B答案合适吗？若选用B现在完成时，那么have searched 与现在联系（关系）或影响，结果是什么呢？
The silence of the library is sometimes broken by a sudden cough or the sound of pages _____.A.turning B.turned C.being turned D.having been turned请问如何选择？谢谢！
Each group of athletes has been focused on training to the maximum, working on technique and molding themselves into two potential fighting units per club for the 2007 Boat Race. One set will be in the Blue Boat for each club and one set will race as reserves in Isis, for Oxford, and Goldie, for Cam...
问题一：1.Tom hit back the urge to tell a lie 不定式做同位语2. His refusal to participate in the project surprised her.不定式做定语Participate in the project与refusal不也是同位关系吗为什么不能与第一条一样作为同位语？问题二：Meiling returned from abroad ...
...f greenhouse gases in the world.句子来自2022年高考英语新全国卷的阅读理解题，相关段落如下：Producing
food that no one eats wastes the water, fuel, and other resources used to grow
it. That makes food waste an environmental problem. In fact, Royte writes, “if food waste we...
Fotheringay himself was astonished beyond measure at the thing that had occurred.beyond measure at 的beyond是超过的意思吗？measure（名词） at 表示对事物的估计、测量。beyond measure是无法估计、非常的，加了at表示什么意思
Television repairman was a common occupation.这句话中的主语是否应该用复数，如果不用复数也应是the+television repairman或a+television repairman表示泛指，但是这句话中的主语为什么只用单数，难道这里的television repairman是不可数的。