For forty years Jane Goodall has been outspoken about making the rest of the world understand and respect the life of these animals.1.has been 是is 的现在完成时，那么 be动词时有完成时态的？2.about介词短语充当什么状语呢?
These molecular chains, each assembled from a menu of 20 types of chemical links called amino acids, do biology’s heavy lifting.老师您好，请问这里的assembled该怎么理解？1.仅仅作为过去分词在这里充当定语2.其前省略了关系代词和助动词be
...me from completely opposite
socio-economic backgrounds,it raises all sorts of difficult conversations about
how you should spend and earn money.当处于一段关系中的两个人来自完全不同的社会经济背景时，就会产生各种各样关于如何花钱和挣钱的困难对话。But as...
...ctionary》）《朗文当代高级英语辞典》（《Longman Dictionary of
Contemporary English》）《麦克米伦高阶英汉双解词典》（《Macmillan English-Chinese
Dictionary for Advanced Learners》）学生通过查询“afraid”和“foremost”这两个形容词来进行对比：...
... days 不理解，为什么用介词at呢？
They are weaned and capable of flight at 21-28 days.
这个句子出自State University of New York College of Environmental Science and Forestry的一个网站页面，因此应该不会是错的。想请答疑网的专家老师指点一下，非常...
... Netherfield you should be gone in five minutes, you meant it to be a
sort of panegyric, of compliment to yourself -- and yet what is there so very
laudable in a precipitance which must leave very necessary business undone, and
can be of no real advantage to yourself or any one else?"你今天早上...
...e the cat’s arrival, and the night the cat disappears is the first night of sound sleep he’s had since bringing the cat into the house.请问老师：1 and the night the cat disappears is the first night of sound sleep he’s had since bringing the cat into the house这个并列句是和 he ...
The present subjunctive form of the verb to be is invariably be for all persons, and the past subjunctive form of the verb to be is invariably were. In all other verbs the subjunctive form varies from the indicative only in that， in the present tense， the third person singular ending is lost.
The tragic sinking of this great liner will always be remembered, for she went down on her first voyage with heavy loss of life.这句话里 tragic 后面为什么要用 sinking 而不是 sink?
with the deadline nearing for appeals to be lodged at the Court of Arbitration for Sport, WADA has reportedly requested more information on the incident.请问nearing是with复合结构中的补语吗？for appeals to be lodged at the Court of Arbitration for Sport是deadline的定语吗？求划分...