telephone number several times,but he couldn't learn it by heart.——the telephone number several times,but he couldn't learn it by heart.Ahaving told B Having been told .C although he had been told D He had been told.我想知道这道题目涉及

telephone number several times,but he couldn't learn it by heart.——the telephone number several times,but he couldn't learn it by heart.Ahaving told B Having been told .C although he had been told D He had been told.我想知道这道题目涉及
telephone number several times,but he couldn't learn it by heart.
——the telephone number several times,but he couldn't learn it by heart.Ahaving told B Having been told .C although he had been told D He had been told.
我想知道这道题目涉及的语法要点 除此之外 我想知道英语句子最基本的要点 类似一个句子中有一个主谓 之类的.

telephone number several times,but he couldn't learn it by heart.——the telephone number several times,but he couldn't learn it by heart.Ahaving told B Having been told .C although he had been told D He had been told.我想知道这道题目涉及
这个句子是并列句,由连词but 连接两个独立的句子He had been told the telephone number several times和he couldn't learn it by heart
并列句是指由连词连接两个独立的句子,比如and,but,than等连接的句子.独立的句子是指,主、谓、宾（不及物动词除外）都齐全的句子.
所以A和B两个分词短语就排除了.而句子中因为有although,我们知道尽管中文里有“虽然.但是”,但英文里although和but是不能连用的,所以只能选D
假如这个句子没有but,那这里就要选B,这个句子成为以下这样：
Having been told the telephone number several times,he couldn't learn it by heart.
这个句子中,having been told...是作为现在分词短语作状语,因为尽管是逗号隔开的,但没有连词连接,所以这是一个句子,只能有一个谓语动词couldn't learn,其它的动词都要变成非谓语动词,这里是变成现在分词短语.

一句完整的话就一个谓语可以多个主语，He had been toldthe telephone number several times是完整的句子，but后面也是一个完整句子，but引导的并列句

but 是连词。前后都要是句子，所以逗号前要有he。。。
根据意思要用be told 被告诉，和完成时。。
could 说明是过去时，
所以用过去完成时，还要有he
所以选 He had been told ....

我觉得应该选，翻译如下，即使已经告诉他电话号码好几次了，但是他还是不能记住
语法，就是他应该是被告知，因为后面是他不能记住，还有就是although不能和but用在一起

这句话是考察句子结构，后面有but，所以前面是完整句子，所以选D。但是如果没有but，并且主语不一致的话，就是独立主格结构，即sb doing sth,sb(不同主语)do sth.但是如果没有but，并且主语不一致的话，就是独立主格结构，即sb doing sth,sb(不同主语)do sth. 什么意思 不是特别理解。...

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这句话是考察句子结构，后面有but，所以前面是完整句子，所以选D。但是如果没有but，并且主语不一致的话，就是独立主格结构，即sb doing sth,sb(不同主语)do sth.

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