找到约 30000 条结果

问题 to have done表示发生在主句谓语动词之前？？

经常看到to have done这个形式表示发生在主句谓语动词之前，哪怕主句是一般过去时，也选择这项，那么还有其他可以表示发生在谓语动词之前的形式吗？还是只有这一个？

问题 句子分析

I went there in 1984,and that was the only occasion when I _____the journey in exactly two days. 问题:1.exactly是副词，在这里修饰什么? 2.空里是填was able to make还是could make? 管理员辛苦了，老师辛苦了，谢谢老师！

问题 如何区分will have done是将来完成时还是表示推测

will have done 除了可以用作将来完成时外，也可以用作表示完成动作的推测，二者怎么区分呢？谢谢!

问题 having done 作状语时主句用什么时态

老师我想问一下：这样的having done 形式的分词作状语，主句的时态是什么时态？Having gone through a phase of racial discrimination,the United States of American today recognizes four races in the country.这句话为什么是recognizes 而不是recognized? 第二个句子:...

问题 形容词+to do在句中做什么成分？

Curious to learn more about the potential health effects of increasingly popular milk alternatives, researchers have done some investigating and found that plant-based beverages could have benefits beyond providing proteins, vitamins, and minerals.

问题 while so that怎么理解

Customers can hold their bowls at the other end of the pipe while so that they can receive the milk being poured by the milkman into it without any interaction between the two.这里while so that怎么理解？

问题 as if 后的虚拟语气能不能用would have done表示过去

as if 之后的虚拟语气，句子能不能用would have done表示过去？as if后面虚拟语气是否只能用had done 表示过去？

问题 英语作文批改(想请曹老师帮我批改下作文)

...is vividly depicted in the left picture above, three decades ago, a young mother held the small hand of her daughter who was carefree and happy. Contrarily, in the picture on the right, the little girl has become a beautiful youngster, supporting her old mother. The cartoonist aimed to highlight the...

问题 动名词having done 和doing用哪个

这里可以用having finished嘛？

问题 as...as...as if 结构分析

In his tweed suit and cloth cap he looked like any other tourist upon the moor, and he had contrived, with that catlike love of personal cleanliness which was one of his characteristics, that his chin should be as smooth and his linen as perfect as if he were in Baker Street."I never ...

问题 now的词性与用法

...n maybe seventy-two hours. Very soon now I'd doze off, and the instant that happened they'd jump on the little water that was left. 这句中 very soon now 的 now 还是副词“现在”的意思吗? 译文是我现在很快要打盹了。

问题 keep doing 与 keep having done的用法与区别

英语肯定是可以说 keep doing sth 的，比如：The baby kept crying for an hour.但是，英语可否说 keep having done sth 呢？比如：The baby kept having cried for an hour.

问题 为什么从句要用现在完成时

I'll expect to hear that your course work has improved.为什么后面的从句要用现在完成时？感谢回答。

问题 句子理解

...y earn an individual income below $12,140 per year, and slightly more than that for a family of two. If you include housing and medical expenses in the calculation, it raises the percentage of Americans living in poverty to 14%. That’s 45 million people. 个人的贫困水平为年收入低于121...

问题 all the things后面跟定语从句，all the things算是独立主格么

I should be tan, sporty, blond—a volleyball player, or a cheerleader, perhaps—all the things that go with living in the valley of the sun.all the things后面跟定语从句，all the things算是独立主格么?