...not?2. This means that a DNA database may have a lot of data from some
regions and not others, so a person's test results may differ depending on the
company that processes the results.这里的and not others肯定不能分析成插入语语或补充语了，只能分析成并列，那么同样的...
...其言外之意就是也可以用单数：Thousands of pounds have spent on the new hospital. 成千上万英镑的钱花在了这家新医院上。
但我查了一下资料（我说的资料是词典和语法著作，不是网上的资料），得到的结果好像不是这样，Thousands of dol...
... attains a certain fashion, it is advisable to find out what its advocates are aiming at, for, however farfetched and unreasonable their principles may seem today, it is possible that in years to come they may be regarded as normal.
...。谢谢。We'll come at eight so that the meeting can begin early.We are cleaning our classroom so that we will have a better study condition.I always read so carefully that I can make everyone understand me. I always write so carefully that I may make my meaning clear.
America’s S&P 500 stockmarket index ended the first quarter slightly higher than it was at the turn of the year—an outcome that seemed unlikely after a turbulent start to 2016. 请问：(1) at the turn of 是什么意思？(2) start to 2016 是什么意思？
... plaster.Finishing a painting before the plaster dry(or dried 不确定） was a real challenge for fresco painters.请问，老师这句话的主语是什么？ 我的理解是 before 是conj, dry是不及物动词，Finishing a painting before the plaster dry 这种一个名词+一个句子一起...
Mary was invited to give a speech in the morning.(中的不定式为什么是主补) The doctor managed to persuade the patient to receive an operation.(中的第一个不定式为什么为宾语)这二者有什么区别 我觉得第一个例句不定式为宾语。
... the market with the fair till she
had reached the place, by which time it was close upon dusk. 我搞不明白后面这个非限定从中的 which指代的是什么？同样地 it is a statute
everybody concedes is flagrantly unconstitutional.这里的定从很奇怪，看起来好像后面的定...
We even put up a notice to check whether someone happened to find it,
but it was in vain.这是在一篇作文范文中看到的一个句子。这个句子中的 whether someone happened to find
it 是不是应该改成 whether someone happened to have found it 啊？请教各位专家老师。