15587 个回答
when时间状语的问题
二个原因：第一，你试着一口气从the sale读到句末，是不是感觉气不够用？你需要停顿一下，换一口气。逗号就是停顿的地方（意群之间）。第二，take sth into a place本该连在一起，但时间状语on the market day和句末的marketplace发音过于相似，破坏英语的节奏感。故时间状语插入到into之前，加逗号，读升调，表示句子没有...
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虚拟条件句的宾语从句的时态问题
he would be here不能改为 he was here。我们将虚拟条件句改为陈述句表示的事实：I came here because I didn't know he would be here. didn't know是came动作发生时的过去状态。he在这里是came动作发生后到达这里的状态，对didn't know而言是过去将来的状态，因此要用过去将来时态。改为虚拟条件句后，主句和...
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非谓语动词 having done 的相关问题
know是静态动词表示状态，句子谓语had difficulty doing sth的时间和not know是同时的。即不知道这种状态在谓语时间就存在着而不是仅仅存在于谓语时间之前，因此不能使用现在分词的完成体。另外完成体表示过去事件对现在的影响这种完成体的意义只限于动态动词，不适用于静态动词。这一点很多英语学习者（包括部分英语老师）...
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比较句中的would otherwise have been expected语法结构
Researchers calculated that there were 1,800 more suicides than would otherwise have been expected in the next four months.= Researchers calculated that there were 1,800 more suicides than it would otherwise have been expected that there would be in the next four months.即比较分句省略了形式主语it 和...
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make it home中的是形式宾语吗
make it home: 回到家、赶回家。We have to make sure you make it home safely. 我们有责任让你安全回到家里。He won't be able to make it home at Christmas. 圣诞节时他到不了家。Do you think you can make it home for the spring festival? 你认为你能赶得上回家过春节吗?So, we're never go...
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they can的省略分析
You merely need to visit a western supermarket today to see that many people regard protein as some kind of universal elixir – one food companies are profitably adding to anything they can. one food companies are profitably adding to anything they can. = an elixir which food companies are...
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限制性定语从句能不能用which
在限制性定语从句中,which 和that 在指代事物时, 一般可以互换使用, 但并非在任何情况下都是这样, 以下为宜用that, 而不宜用which 的情况。①先行词为不定代词,all,much,something,everything,anything,nothing,none,the one等,We should do all that is useful to the people .There's nothing that can be said about...
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如何理解句中phase.
phase在此意为：adjust so as to be in a synchronized condition 使同步，使协调一致。There is not much you could say or do to phase me.你能说的、能做的，都不能让我和你协调一致。（即我和你不是一类人，你无法改变我。）
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关于but使用的疑问，使but直接放在句末加逗号，又接句子的疑问
Some ions (Ca, Mg, Fe, K and Na) were absent in the starting solution but, as the reaction proceeded, the minerals in the coal were dissolved, and most of the elements entered into the reaction solution.but连接并列句，but和第二分句之间插入了一个时间状语从句，所以该从句前后用逗号隔开了，以便并列的主...
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