It’s worth remembering, however, that though a clean copy fresh off a printer may look terrible, it will read only as well as the thinking and writing that have gone into it.问一,粗体部分的语法结构。问二,为什么两个分句之间没有连词?
As a result, she says, some of theinjuries associated with
running, such as runner’s knee, are uncommon among race walkers.请问这里的 are 是与哪个主语保持一致?这样的问题如何定位主谓一致?
And last year Khan Academy and the College Board unveiled a free course they say boosts SAT scores for students at all income levels.这里的黑体部分是插入语吗,如果是为什么没有逗号呢?如果不是那是什么成分?
This is the question about which we've had so much discussion这句话中为什么要有个介词about?Everything that he said seemed quite reasonable这句话中为什么又没有介词了?介词什么时候,用什么时候不用??