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 to around 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...
这是个电影台词：I know you’ve been calling. I haven’t had time to schedule a follow-up.关于该句有以下疑惑，还望老师指点：1.通过以上两句，能否判断出说话人用现在完成时表示的是状态(持续到现在的状态) 还是事件(因为没有时间所以...
... shares her thoughts about the idea.
"We cannot hear you but we would like to share a tasty coffee with
you," says Siting. "I believe more people like me can find a career
they _______(dream) about in the future," she continues.答案为什么用一般现在时，这是一般现在时的什么用法...
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.
...典》 attention 条的一个例句：A good teacher is always attentive to their students' needs. 一个好的老师总是对学生的需要很关心。对于句中的物主代词 their 我不是很理解。我觉得 A good teacher 应该对应单数物主代司 his，而不应是 复数形式...
...提到句首时，主句须用倒装语序。如：So interesting is that story that everyone wants to read it. 那个故事那么有趣，大家都想看。So good a girl is she that we all like her. 她是一个如此好的女孩，我们大家都喜欢她。that 后面不应该是主句么？？...
How can you expect to learn anything ____ you never listen? A. in case B. even if C. unless D. when答案为 when。到底是“既然”的意思还是“如果”的意思。我认为在这都说得通，结构也没问题，请讲解一下。
I have found a mobile phone . Do you know ( )?A.who the phone belonged toB.who is the owner of the phoneC.who the phone belongs to请问老师哪个是正确的呢？答案给了B，我感觉AC也说得通啊。谢谢老师指点。