今天做一道题：What have you decided to give your mother （ ）her birthday？答案应该是for，但我填了on想请教各位老师，birthday前面的介词是用on还是for？又如语法网上这个例句：I remember being given a bicycle on my tenth birthday，为什么就用on...
"Do you think it's likely that a man will do any good when he starts at your age? Most men begin painting at eighteen.""I can learn quicker than I could when I was eighteen."为什么书上和网上都将"I can learn quicker than I could when I was eighteen."翻译为：要是我十八岁就开始...
...eated by workers moving massive stone blocks,China's great wall spans
thousands of miles and is large enough to be seen from outer space.像分词短语、介词短语这样的成分，很多时候既可以看做定语又可以看做状语。个人感觉这两种短语，做什么成分和他们在...
... sit where the stadium seating for 600 spectators, the
raised acting area, and the orchestra pit for seventy-six would be constructed
and draw the different falls of light.想请教老师：draw the different falls of
light 怎么理解呢？draw在这里表示“绘画”吗？谢谢老师!
If
human beings had been a bit less greedy
and cruel, more birds and animals ( ) dying out.A.ought
to avoid B.could have been avoided
C.should have avoided D.might
have avoided1）此题答案是D. 我实在想不通C为什么不可以？选D：如果人类少一点贪婪和残忍，更...
...tily organised gathering point, as shocked as the survivors of
earthquakes and tsunamis. More shocked, perhaps: the destruction they escaped
was not some sudden act of God, but a protracted, deliberate and horribly human
assault.
Time after time, during the Civil War, Lincoln put a new general at the
head of the Army of the Potomac, and each one in turn—McClellan, Pope,
Burnside, Hooker, Meade—blundered tragically, and drove Lincoln to pacing
the floor in despair.句子来源：现代大学英语精读第2册 12单元
... the appropriate relative level of expenditure for different tumour sites, and to inform debate about the distribution of funds请问这个句子中，as的主语（可以这么说的话）是什么？问了一个外国人，他说这个句子可以改成：1.Recently, mortality from cancer has also...
How come you could have forgotten being helped by that guy so kind ?请教老师，句中could have forgotten 是表推测吗？可是既然都说“你怎么能忘了帮忙的人”，应该是很肯定的想法了。所以could have done 是什么含义呢？谢谢老师！
— Helen, are you going to the airport to pick up Jack the day after tomorrow?— ________ tomorrow night., I would go.A. Were he to come back B. If he was about to come backC. Had he come back D. If he would come...