All of the plants now farmed on a large scale were developed from plants that once grow wild.这个句中有once ,为什么grow用一般现在时而不用一般过去时？一般现在时表经常发生的动作或存在的状态，表日常行为、习惯、能力或客观存在。句中的一般...
...ump administration’s proposal will give states wide latitude on how to regulate emissions from coal-fired power plants, even letting them opt out of the task altogether, which will enable some plants to carry on for longer than they would have otherwise. 第一个疑问：请问老师，...
原句：Such chemical
communication can be compared to the human use of visual and auditory channels（as in religious
chants.....）to arouse and propogate
moods and attitudes.to arouse and propogate
moods and atittudes的成分是什么？修饰对象是谁，如果修饰use的话，use作为名...
...despite its impetuosity, or precisely because of it, was
already plunged into emptiness a generation later, i.e., it was not able to
allow a truly creative oppositionto emerge. ”
我是这样分析的，ing分句“standing behind a new front...”作为后置定语修饰an unvanquished
fortress...
...ime, for what it tells us about the nineteenth century, but also as a text that can teach us certain things about ourselves in contemporary society.有几个问题需要请教老师：问题一：to think about Thoreau's text我理解成one way的定语，但是脑袋里的思维是应该理解...
...s telling the truth or not.我不知道他是否说了真话。used to say that you do not want sth or will not allow
sth （拒绝或不允许）不 ‘Some more? ’ ‘Not for me, thanks. ’“再来点儿吗？”“我不要了，谢谢。”‘Can I throw this out? ’ ‘Certainly not. ’...
...ring, European venues have an enticing list of temporary exhibits designed to educate and entertain visitors.非限定动词是与谓语的时间进行比较，那我想问如果非限定动词后还接一个非限定动词的话，那后面的非限定动词还是与谓语时间进行比较吗？...
...ork is very important, I can work just as hard alone. Though more pressure to produce might exist, it would also prove to be a challenge.介词as后面hard alone什么意思？
Airline personnel also need to be trained, or better trained, to be
more compassionate in how they handle people, he said, be it demonstrating sympathy
when problems arise or simply being specific when asked about delays, saying
“20 minutes” instead of just “a few more minutes,” which create...
非谓语动词后面接的从句有哪些？Once students have learned to deal with stress, they will benefit them for the rest of their later life, including when they need to cope with working pressure.麻烦具体分析一下：including 及其后面的when从句分别是什么成分？
...ich looked like maps of Japan and America, side by side the way they ought to be, and when the subject of the bomb came up, he resisted blaming anyone. "The war," he would say, "is finished." side by side是副词性质的，在这修饰那个成分？
In that case you must realise that while you can still help them in material ways, as by making them an allowance or knitting them jumpers, you must not expect that they will enjoy your company. as 是副词，列如的意思？by是用什么方式的意思？