When doctors
carried out an electroencephalography (EEG), they had discovered the patient
had developed epilepsy. However, during the EEG recordings he had experienced a
heart attack and died.这个句子按照逻辑，应该是医生执行了EEG后，才发现病人的问题，但为什么这里主...
Tom has gone out. Tom _______.
A. was out
B. has been out
C. is off
D. will be out
说明：对不起，由于匆忙，原题中的 C选项打成了 is out，其实是is off, 很抱歉！另外，我说请专家再补充的意思没说清楚，我想问的是选C 即 is off 可不可...
同一个主语是，但前后句时态不一致是，后半句能省略is吗?The country has （been/gone) through a drastic reduction in its birth rate _______ facing labor f shortage. 请问下老师：has been through 和 has gone through是不是都可以用？
后半句直接...
在一本资料书上看到，not...until…句式用于强调结构时，其基本形式是It is (was) not until…that…，但我见过It was not until…that…这样的句子，没有见过It is not until…that…这样的句子。请问not...until…的强调句式可以用于一般现在时...
Christine stared angrily at her boss and turned away, as though______out
of the office.A.went B.gone C.to go D.would go这个从句应该是虚拟语气与过去事实相反，不应该用would have done的形式吗？为什么要用不定式to do？
It
is in 1960 (that) Chinese first put on our flag on Mount Qomolangma.1）要求填写that,
说这是强调句。请教您：为什么不是It was in 1960...?2）使用强调句
It is...that 和 It
was...that, 如果用了is,是目前说的，如果用了was, 是不是以前说的话，以前强调...
...ings. You tried to understand him. You practiced empathy.这几个句子的时态怎么理解？以上提问句为以下文章节选的最后一段：Imagine you are
shopping at a mall. You see a little boy standing alone. He is looking around
and crying. What would you do?Maybe you would
think, "Po...
...5题给的答案是 has begun。请问老师，这里 begin 用现在完成时态，和 until 有关系吗？until then 指的是：在 he'll no longer be able to
write the reports 之前，那应该用将来完成？那这里为什么用 has begun 呢？谢谢老师!
...以Entering the US university 如果用定语从句表示应该选择什么时态?1) ... amomg students who are entering the US university. 2) ... among students who has entered the US university3) ... amomg students who entered the US university. 其中，1）是正确的，are entering 表示...
...老师好！我在阅读英文小说时有时会遇见一个中出现多个时态的情况，比如：1. Silas continued, in his voice like velvet, “You had parents. An older sister. They were killed. I believe that you were to have been killed as well, and that you were not was due to chance...