老师好！向老师请教一个句子：Though they’ve been around long before
we walked on the earth, sharks still attract us to this day.请问：they’ve been around
long before we walked on the earth 中的
have been around 的时态是否合理，是否应改为had
been around？
...005, the share of non-fossil fuels in primary energy consumption will rise toaround 15 percent, the forest coverage will increase by 40 million hectares from 2005 level, and the forest stock volume will be 1.3 billion cubic meters more than that in 2005.老师您好，我想问一下逗号不是不...
They counted on Lisato be at the staff meeting.请问老师，这里的 non-finite clause 是否为internal complement of the VP?We hadn't counted on his being so insensitive.根据，剑桥学生语法书，这里的加粗字是 PP complement headed by on.另外，第一句中 Lisa 是否为 raise...
Nowadays those who call themselves intellectuals would insist on
writing essays in an obtrusive style IN WHICH are presented high-flown ideas
for the edification of the literati,rather than think of bringing light to the
younger generation in the towns and villages.
...要写校园以及网络暴力的相关内容，有这么句话Mrs Trump has produced a leaflet, suggesting parents discuss with their children their online lives, about which they often know nothing.特朗普夫人制作了一种传单，建议父母关心孩子的上网经历，让孩子敞开心...
见到过 take turns to do sth 和 take turns doing sth。两种用法都存在吗？若是，两者有什么区别？ 在现代英语用法词典上还看到有 take turns at doing sth。如： The lawyers take turns at reading the Bible. 还有一种 take turns in doing sth。如： We took turns ...
...earn from the beginning of the passage that Web business tried but in vain to control the market.【参考译文】我们从文章开始部分了解到网络商务企图控制市场，但徒劳无功。【我的疑问】in vain 是介词短词作状语，这里的 but 是副词还是连词？谢谢...
It was comforting to suppose that the stream of life would flow on through time in whatever course God had given it - without interference by one of the drops in that stream -man. " 1、whatever course God （which）had given it这个which不在从句中作宾语，为什么省略？2、...
These groups mainly rely for instilling needed dispositins into the yong upon the same sort of association which keeps the adults loyal to their group.请老师帮忙翻译并分析此句，谢谢！
To explain the above phenomenon clearly, taking two testing samples (MC-15.2%-1.59 and SC-15.2%-1.85) as an example.老师，这是我自己写的句子，我见过类似的，觉得这种写法应该是正确的，但我的疑问是为什么没有主谓宾和主系表结构，也能写出一个正...
又找到一个much可以修饰原级的例句，与大家分享。I mean, they enabled the Aztecs to grow plenty of food... in an area without much available farmlandhttp://ask.yygrammar.com/q-22137.html 这是之前的相关回答。