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问题 名词性从句中whether和if原则的起源和优先级问题

...不能互换的：1 只能用whether，不能用if的情况  whether+or not；介词+whether; dicuss+whether; whether放句首；从句有if条件句；两种选择选其一；用if容易引起歧义时 。2 只能用if，不能用whether的情况 从句为否定形式。我的问题...

问题 关于英文句子的提问：Chinese and Western food is often very different

... and Western food is often very different. Chinese people like eating rice or noodles, but Western people eat bread. 宾语从句Chinese and Western food is often very different是否容易产生歧义？ 我觉得这句话给人的概念是：中西合璧的食品与众不同。 但是，课文...

问题 关于fight和tussle在句中作名词还是动词的疑问

And why only snakes? Cats, for instance, would be greatly helped; no running fights with large, fierce rats or tussles with grown rabbits -- just a bite and no more effort needed. In fact, it would be an assistance to all carnivores though it would be a two-edged weapon when they fought each other....

文章 英语基础语法快速入门——不定式

...t of the window is dangerous. 身探出窗外很危险。To know something about English is one thing, but to know English is quite another. 懂点英语是一回事，掌握英语完全是另一回事。由于直接将不定式置于句首作主语有时会显得“头重脚轻”，所以有时我...

问题 句子动词开头无主语的情况有哪些

句子动词开头无主语的情况有哪些  如 Keep on working hard， and someday you'll be successful  为什么可以没有主语

问题 句子分析

I had to be wheeled across the coutyard on a gurney. As we emerged from our unit the sun light hit me. That is all there was to my experience. Just the light of the sun. 问题：不明白“That is all there was to my experience.” 这句话的语法成分。“That is all there”是主...

问题 有时间参照的完成时用法

请问一下。Before my sister went for her interview, she researched the company on the Internet and consulted a few people.句中从句before有时间参照，为什么主句不用had researched呢？希望老师帮忙，谢谢了！

问题 did sightseeing是什么用法

Kristin Diehl conducted a series of experiments on photo-taking to find out whether people enjoyed it when they did sightseeing.过去式did后面为什么用ing形式（有did doing句型吗）？

问题 since引导时间状语从句

...直在干嘛。而不能用于“已完成的影响用法”，He’s put on a lot of weight since he gave up smoking. 他戒烟后体重增加了许多。　　

问题 句子成分分析

I wish to die while still at work,knowing that others will carry on what I can no longer do, and content in the thought that what was possible has been done.这里content可以和knowing并列嘛？content是形容词。后面那个that what...又是什么结构？还请老师们指教！

问题 Take在比较中的用法

原句：Mars takes longer to revolve on its axis than the earth.翻译：火星自转一周的时间比地球长。按理来说句子主语应该是'火星'，而不是‘时间’.我先请问大家这是什么用法？

问题 for的含义理解

This building is a glorified incubator for every infection on the plant.这本句出的翻译是“这栋建筑是美化后的用来隔离地球上各种感染的恒温箱”，但原英文并没有表示隔离意义的单词，为什么会有“用来隔离”这几个字呢？难道这是因为for...

问题 关于up的疑问

...里摘抄的一句话，请看：For more than 10 years, suicide rates among students aged 10 and up in the U.S. have been on the rise. 10多年来，美国10岁及以上学生的自杀率一直在上升。请问这里的up是什么词性？省略了什么成份？谢谢老师！

问题 句子结构

So can the movements of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.这句话前面是根据上文省略了动词并且倒装了吗，后面when这里为什么有逗...

问题 mirror用法

"The regression of braincase sinuses in thallattosuchians mirrors that of cetaceans, reducing during their semi-aquatic phases and then diminishing further as they became fully aquatic," Mark Young, the paper's lead author said in a statement on Wednesday.这句话的mirror是不是和什么一样...