英语 时间状语从句 when , while , before , until 区别及每个的特殊用

说起这几个词的区别，实际上是很容易的，因为意思相近的只有when和while，其他两个的意思有很大的差别。但是，就算有很大的差别，有时候也能表达相同或者相近的意思。
When和While都有同时的含义，比如。Shut the door when you leave the room.随手关门。但是，比较区别大的一点是While对句子发生时间的同时性要求更为严格，常常其中的一个句子(主句或从句)要用到进行时。比如I was playing video games while he entered the room.他进房间时，我正在玩电子游戏。另外，要区分while的另一个用法，while在句中也会用做连词，表达转折的含义。比如，Boys like cars while girls like barbies.男孩儿喜欢汽车，而女孩儿喜欢娃娃。这个句子你就不能翻译成男孩喜欢汽车同时女孩儿喜欢娃娃。我说的，就是这个意思，要区分什么时候是时间状语从句，什么时候是转折。
before和when没什么要区分的，因为他们俩也不容易搞混。You should stop the train before it is too late.你必须阻止火车，要不然就太迟了。beore翻译成在。。。之前。before 有两个特殊用法。这两个用法比较容易混淆。就是long before 和before long,前者表示很久以前，后者表示不久以后。但是，他们的词性不同，可以帮助你区分。前面的词性是连词，连接两个句子，比如，How wonderful to be able to let go and smile again, long before you are dying.在你死之前能放开一切并且微笑面对，是一件多么伟大的事情啊。而before long是副词词性，比如，He shot the gun,before long,got caught.他打了一枪，不久后，就被捕了。
说起until，就不得不提not until句型，意味知道。。。才。。。He doesnt know she is a student until she shows her schoolbag.他知道她亮出书包才知道她还是个学生。

英语中v，vi，vt有什么区别

v.是动词的总概念,包括及物动词和不及物动词。
vi是不及物动词,后面不能直接加宾语,句子到此为止,如要加宾语需要用介词。例I arrive. /I arrive in shanghai. 而不能说I arrive shanghai. 
vt是及物动词,可直接加宾语，不能单独使用。I reach shanghai.而不能说I reach.或I reach +prep.+shanghai.


扩展资料:
1）状态系动词
用来表示主语状态，只有be一词，例如：
He is a teacher.　他是一名教师。（is与补足语一起说明主语的身份。）
2）持续系动词
用来表示主语继续或保持一种状况或态度，主要有keep, rest, remain, stay, lie, stand, 例如：
He always kept silent at meeting.　 他开会时总保持沉默。
This matter rests a mystery.　 此事仍是一个谜。
3）表像系动词
用来表示"看起来像"这一概念，主要有seem, appear, look, 例如：
He looks tired.　 他看起来很累。
He seems (to be) very sad.　 他看起来很伤心。
4）感官系动词
感官系动词主要有feel, smell, sound, taste, 例如：
This kind of cloth feels very soft.
这种布手感很软。
This flower smells very sweet.
这朵花闻起来很香。
5）变化系动词
这些系动词表示主语变成什么样，变化系动词主要有become, grow, turn, fall, get, go, come, run.
参考资料:百度百科-动词

关于off的短语有哪些?

badly off 贫困，贫穷 better off 情况较好 right off 立刻，马上 (= straight off) well off 富裕 worse off 情况较差 be off离开 take off［飞机等］起飞；脱下 put off推延［时间］ hurry off匆忙离开... turn off关掉... get off下车 have /take/ask for a day off请假/离开一天 fall off从...掉下 give off发出［光、热、气味等］ keep off让开，不接近

英语阅读理解

31. B（见第一段最后一句） 32. D （见第二段第一句） 33. D（见第二段最后一句） 34. D （根据整篇文章的意思可知，真正原因应该是人们对所见现象的理解不同） 35. A（第二段最后一句就有“many experiments”）

life now and then为题写一篇英语作文

We are supposed to express our gratitude to others on Thanksgiving Day. However, we should feel gratitude every day. God has two dwellings, one in heaven, and the other in a meek and thankful heart. Be grateful to others is a way to show your love. In our daily life, we often receive help from our parents, friends, colleagues and strangers. Perhaps it is a little thing, pick up the pen you drop, lift a heavy box for you or offer you a seat in the bus. We should be thankful to them for whatever they have done. The more love you give, the more love you receive. A sense of gratitude can acknowledging our interdependent existence. You will be ready to help others if you have a thankful heart. Therefore, a thankful heart is like a magnet. Not only will we attract more things to be grateful for, but also we will attract gratitude from others. “give thanks a little and you will find a lot.” Gratitude is heaven itself. A sense of gratitude and indebtedness to others is and important wellspring of a generous and virtuous life. We now fall into a busy life, neglecting to be grateful for details, the beauty of nature, the comforts of modern living ,the love of parents and so on. People can notice these details and realize the friendship, love and happiness in our life with a grateful heart. Gratitude is the fairest blossom which springs from the soul. Be thankful for whatever you have, give and receive. Happy Thanksgiving today and every day!

关于我最喜欢的城市的英语作文150字

我最喜欢的城市(my favourite city) Shanghai is my favorite city. I like it because I was born in there, and a lot of my family members and my friends live there. The shopping in Shanghai is cheaper than here, but it’s expensive in China. I have a lot of things to do there, like: shopping, playing, going to my friend’s home… And there’re also a lot of places that are interesting. In Shanghai, people speak the same language as I do. I was there for 13 years! I left there on August, 18th, 2005. And I was there because I was born in there and I lived there. There’re a lot of people in Shanghai. The people are like me. We all speak the same language. The people in Shanghai are busy and friendly. And Shanghai is also and international city. It’s beautiful and fancy. There’re a lot of tall buildings. That’s why Shanghai is my favorite city. It’s my home city. I love Shanghai!!! I’d like to go back to Shanghai, but just for a visit. Although Shanghai is good, I’d like to live here because I’d like to study here. I only get a little homework and the air here is flasher than Shanghai. The weather is hot in Shanghai. And the best time of year to go there is spring, because in spring, the weather is cool and warm. But some people asked me:” Why don’t we go there in the fall? The fall is also cool and warm.” I don’t think so, because in Shanghai, the fall is still very hot. I’d like to recommend this place to other because I want more and more people to know and visit my hometown. I hope if I ask my friends:” Have you ever been to Shanghai? Do you like Shanghai?” The answers shouldn’t be:” No, I haven’t been to Shanghai. And I don’t even know anything about Shanghai!” Now, I’ll recommend you to go to visit Shanghai in summer vacation or winter vacation or spring break or every time you’d like, you’d want, because Shanghai is a very nice city. If you go there, you’ll soon like it!