15621 个回答
before连词的现在完成时
Three years has passed before we know it.Three years has passed before we knew it. 这两个句子均为语法错误。know为静态动词，可以活用为动态动词，意为get to know。当用在before从句中时，know=get to know. 如果before从句是用一般现在时代替将来，则get to know为将来时间，主句则应该用将来完成时will have passe...
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I can't tell you why中情态动词的理解与分析
can作为情态动词有诸多用法，如表示体力或智力方面的能力、表示理论上的可能性、表示推测（否定和疑问句中）、表示允许等。在网友提供的这个语境中，我认为牵涉can的二种用法，即能力和允许。Who did this?I really can't tell you. (could这种过去形式表示现在，属于委婉用法，这个语境中没有委婉的理由，故不该...
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虚拟语气中was和were的选择
if从句表示与现在或将来事实相反的假设时，不分人称一律用were，这是正式语体。但在非正式语体，当主语为单数一、三人称时，可以用was而不用were. 此时意义完全相同，只是语体有差异。不过，if I were you, 和as it were这二个结构中的were不可以用was替换。网友的句子显然是非正式语体，如果用were，虽然语法没有错误，但...
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考研英语2000年卷作文批改
As is shown on this two pictures: In 1900, there are a marjority of fishes in the waters while only one ship on thewaters. And yet, in 1995, there are only one fish while a host of ships on the waters.As is shown in these two pictures, in 1900 there were plenty of fishes but only one fishboat on the...
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介词to和for的问题
我觉得四个句子都不妥。句首的unsave places，我觉得是句子的theme，而不是目的地或方向。所以这个句子要么改为： As for/to unsafe places, it is better not to ask children to go there.或者改为：It is better not to ask children to go to unsafe places.
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“故事发生的经过”的翻译
When you read/listen to the story, pay attention to when, where, why and how the event takes place.
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句子理解（托福听力句子）
I gave you a list of appropriate works of art for you to write about（them). for you to write about (them) 在这里不是定语，而是目的状语。不定式作定语，如果被修饰名词与不定式为动宾关系，不定式必须采用悬空结构（传统语法称为反射不定式）。直接宾语you为不定式的逻辑主语，如果不定式作定语是不需要表示...
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介词like引导的方式状语疑问
夸克将状语分为与主语有关的状语和与宾语有关的状语。例如：He treats the girl like her father. (= as if he were her father 与主语有关的状语)He treats the girl like his daughter. . (= as if she were his daughter..与宾语有关的状语 ) （还可能理解为 as his daughter does)你的句子中，like...
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否定转移与反意疑问句
不存在主句否定转移到从句的问题。转移否定指的是从句的否定转移到主句。这是英语的思维习惯使然。在形式上主句是否定句。在语义上从句是否定句。原则上反意问句是根据主句来构成的，所以反意问句为 does she? 少数情况下说话人可能希望听话人就从句内容的真实性发表意见，由于从句在意义上是否定的，所以根据从句构成的反...
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