...看下面两个句子
Once seeing it,you can never forget it.
Watching the news everyday we know what is happening in the world.
这两个句子中，为什么第一句状语从句省略后可以带从属连词once，第二句的省略中，从属连词都没有呢？
万分感谢！
CNN 10《The History of Germany's Autobahn》There are a lot of different directions it can go.And while some introverts might like the idea getting driverless, it can drive some extroverts crazy.So, we'll see if and when it gets in gear, if it's a signal of real change or if it's a long turn that...
2021全国高考（新一卷）Going to MountHuangshan reminds me ofthe popular Beatles’ song “The Long and Winding Road”. 56______ is so breathtaking about the experience is the out-of-this-world scenes. The rolling sea of clouds you see once you are at the top will remind you how tiny we 57...
...create, give,
convey, leave, provide等。如：You don’t want to
convey the impression that we’re not interested. 你不想给人留下我们不感兴趣的印象吧。It makes / gives
/ creates a very bad impression if you’re late for an interview. 面试如果迟到会给人留下很坏的...
...den is going to come in with his guns blazing in terms of executive orders.The first president George Washington issued the first of what were called executive orders.1) 这里的can是肯定句中表示可能性吗？2) 这里的what=the things that/which，what作call的宾语？executive orders...
...问题句而言，what应该保留，这是因为动名词短语assigning these rankings to various usages的语义决定的，what 仅指代了主语的一部分rankings. 现在我们忽略这个语义，把句子主语再改一下：These rankings are much more helpful than what one finds in exist...
...can his reputation lasts long.2）Only in this way can we make good use ofthe used textbooks. 1. 这个两个句子Only 引导的介词短语放置句首，主谓倒装（部分倒装）属于同一类型，是吗？2. 句1）情态动词can和实意动词lasts倒装，lasts 应该...
As it happens , we had been having a great number of cases of
diphtheria in the school to which this child went during that month.
请问在这里使用完成体和完成进行体的区别是什么？
完成进行体更强调事件在那个月里不断发生吗？还是本质区别并不在此？
...
...ove alone is insufficient to lead a good life.
Love sometimes blinds us to the reality. Consequently, our good intentions may
not lead to good results. To achieve desired outcome, those who want to do good
to others also need to equip themselves with accurate world knowledge. False
knowledge is more...
...20页说：不定式分句用作伴随状语的情况如下：1)We divided the work, me to take care ofthe children, the others to work in the fields.2)A number ofofficials followed the emperor, some to hold his robe, others to adjust his girdle, and so on.困惑：只知道ed/ing分词可以用...
We had all heard that it was a great dam, as modern as any of its kind in the world.主句had heard是过去完成时，宾语从句的时态应该至少不晚于主句的时态had heard, 那么为什么宾语从句仍然使用了it was一般过去时呢？We had all heard that it HAD BEEN a great d...