...uld technologies should be patented or should they be used for the benefit of mankind.请问老师：这里的should是什么用法？整句话是什么意思呢？实在没搞懂。我一开始以为倒装，理解为if “如果”，但是意思好像不对。
It is our pleasure to keep our classroom clean and tidy.
请问红色部分为什么是宾语补足语？这句话的主语是不定式做主语还是主语从句做主语？
我认为to keep our classroom clean and tidy是句子的主语，那么主语中的成分怎么会是宾语补足...
This might explain why,after the financial crisis,women managed toadapt to the decline in middle-skill jobs better than men did,despite women being hit hardest.being前面不用加 were 吗？为什么？
Hydrogen，which is ______ than oil, is pretty easy to produce and does not harm to the environment.空格处为什么不能填 an energy source more abundant呢？如果这么填的话，an energy source 看做is 的表语，more abundant than oil 看做an energy source的定语。这样子的话...
...research-like the many studies on experiential spending and happiness done to
date-is that people would likely be wise to tilt their spending toward
"doing" rather than "having."这句话的done怎么翻译，就像幸福做的那样？感觉不通顺。like这里是个插入语，done应该做谓...
老师说：please（请）用在句首时，后面不用逗号；please（请）用在句末时，它的前面可用逗号也可不用逗号。如：
Please fill in this application form. 请填写这份申请表。
Fill in this application form, please. 请填写这份申请表。
Fill in...
FEMALE STUDENT: I wish I could say another time would be OK but…you know how it is… everybody’s already got commitments… for the whole semester.FEMALE STUDENT: 2: 30 or 3: 30 would probably be OK but I don’t think we could go much outside that…FACILITIES MANAGER: Well, che...
...。例如：1）以however 举例我发现韦氏词典上：I'd like to go; however, I'd better not. [=I'd like to go, but I should not]The forecast is bad. It's possible, however, that conditions could improve.Sales are up this quarter. However, expenses have increased as well.为...