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问题 表示在某场合occasion前用介词on与at

表示在某场合 occasion 前用介词 on 的。如： The friends call each other on occasion. 朋友们有时相互通通电话。 She ran away from home on several occasions. 她几次离家出走。 On this occasion, as it happens,the engine started immediately. 这一次碰巧引擎...

问题 不定式完成时可不可以做原因状语

...是早于谓语动词的动作的，例如 He is happy to have heard the good news. be happy应该是听到好消息之后，那么这种情况下To have heard the good news，he is happy.这个句子成立么？还有就是To have finished his task，he went out. 这个句子中To have finishe...

问题 yet与still的区别(涉及have to be pp与be to be pp)

The problem has yet to be studied in depth. The problem has still to be studied in depth. 上面两句哪句对？都对吗？若是这样，那用 yet 与用 still 的区别是什么？

问题 不定式与动词 v-ing 形式在实例中的的比较与区别

She pointed at the road signs on the map, ______ directions. (give)She got two part-time jobs ______ money to pay for her son's tuition. (earn)老师们好，请问这两句话，是用不定式, 还是Ving.? 特别是第一个是不是 giving 和 to give 都可以？

问题 whoever，whatever引导让步状语从句时在从句中不做成分吗

...ichever引导让步状语从句时，有些疑惑。如：Whoever you ask, the answer is always the same. Whatever happens, don’t forget to write to me.这些句子的从句里，whatever，whoever做了主语和宾语，那他们还能算作从属连词吗？ 

问题 if+subj.+v-ed 可否表示对过去虚拟

The divisions in the very front line should have felt threatened if any did.根据段落背景，这个句子中的非真实条件句肯定是表示对过去的假设，但是使用了did而非had did。以下哪个看法更合适？1.did作为替代词替代了had felt threatened，但是did作为...

问题 find后面可接不定式to do作宾补吗？

...接现在分词和过去分词作宾补，如： He found her crying in the corner. 他发现她在角落里哭。 He found her wallet stolen on the bus. 他发现他钱包在公共汽车上被偷了。 但是，find通常不接不定式作宾补，除非这个不定式是 to be。如： We ...

问题 It is expected for sb to do sth对吗

...p;It is expected that she will leave immediately. It is expected that the President will speak today. 它们可以改成 It is expected for sb to do sth 吗?It is expected for him to come. It is expected for her to leave immediately. It is expected for the President to speak...

问题 关于although...but...与but...although的用法问题

VOA 原句: The most interesting part is not how much they spend, although that's important, but where they're spending it. 这句话貌似是VOA新闻的即兴采访，也就是现场口语录制，很可能有语法错误。请老师核实。改写后的句子：The most interest...

问题 tell sb not to与tell sb not to do的区别

麻烦曹老师讲解一下:The boy wanted to ride his bicycle in the street, but his mother told him _____．A. not to     B. not to do   C. not do it    D. do not to为什么选项 B 不能选呢？

问题 only后接宾语位于句首时要倒装吗

only 后接“状语”位于句首时，句子必须倒装。如：Only then did she tell him about the attack.  直到那时她才把袭击的事告诉他。Only in Paris do you find bars like this. 你只有在巴黎才可会找到这样的酒吧。另外，如果 only 后面接的是“主语...

问题 be about to do sth可用于被动式be about to be done吗

The students are about to be shown how hard the test is.这个句子符合英语习惯吗？我是说这里的 be about to do sth 用了被动式，好像很少见吧！

问题 关于短语动词其前面的动词及物不及物，后面的词是介词还是副词的判断方法是否正确

...v+xxx+something/someone[如：wear on (someone)]xxx为介词。 例句：Their constant talking was wearing on me.若为这种注解：v+xxx未写出someone/something的[如wear away、wear out]。则前面动词为不及物用法，后面为副词。例句：The paint on the sign had worn away./The...

问题 since后接短暂动词一般体和完成体的语意理解

Since he joined the army,he has been in much better health.此类句一般表示，从句提供从某个过去时间点到现在的一个时间框架，主句开始发生于此时间框架内的一个模糊时间点。教辅书中提到此句有暗含的语意(他可能现在仍在军队里，也可...

问题 既是连词又是介词的词引导的从句中的动词形式问题

1.①After exposed to the sunlight for too long,your skin will become dark . ②After being exposed to the sunlight for too long,your skin will become dark. 请问 这两个句子的区别是什么？ 2.引导状语从句的“引导词”既可作连词也可作介词(如after，before，since...