Sixty-five million years ago, according to some scientists, an asteroid bigger than Mount Everest slammed into North America, an event that caused the plant and animal extinctions that mark the end of the geologic era known as the Cretaceous Period.
语法 Sentence Correction-3885
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zheng911 2015-01-06 00:04:22
Thi s sentence describes a two-part sequence of event s, the second of which has led to a part icular categorizat ion of geological time. In order to clarify that i t i s not the fi rst event (asteroid st rike) that produced the time divi sion (end of the Cretaceous Period), but the fi rst event ’s consequences (biological ext inct ions), the sentence needs an apposi t ive form to restate the content of the main clause (an event ), fol lowed by a two-part chain of relat ive clauses (that caused . .. that mark . . .).
sonic 2014-09-29 21:47:23
﹝判斷小技巧﹞a(an) finding/discovery/theory/event，多半意味著解釋前句名詞，象徵子句將要結束之意味。
huiminzi1124 2016-07-02 20:44:51
A. which需要有具体的指代对象，不能用于修饰前句整句描述的事情;causing现在分词表示动作正在进行或还在延续，含义不正确。 B. which需要有具体的指代对象，不能用于修饰前句整句描述的事情;marking前面需要有逗号 C. and causing没有平行对象 D. and it marks….完整独立句子，构成run-on错误;it指代不清，可以指代an asteroid，也可以指代an event，且 it 优先指代同在句子中充当主语成分的 an asteroid，不符合逻辑。 E. 正确。 句子结构：…, according to…, an asteroid … slammed into…, an event that… 划线部分以前为句子主句，an event为同位语，概括前句内容：An asteroid bigger than Mount Everest slammed into North America. 并对其意思进行了补充和拓展。" 考点:句子结构(Grammatical Construction)、指代一致(Agreement), 逻辑表达(Logical Predication) 连词and在连接句子时，只能连接并列的独立句子(即主句)，and后面的句子不能与从句并列。which需要有具体的名词指代对象，不能用于修饰前句整句描述的事情，即不能指代句子。 现在分词作非限定性修饰成分，修饰先行词，表示主动、有动作正在进行还在延续的含义;相反， 使用过去分词作非限定性修饰成分，修饰先行词，表示被动，或者表示动作已经结束。 补充说明:位于句尾逗号后的同位语，如a(an) finding/discovery/theory/event等，概括前句内容，对内容进行进 一步拓展说明。这种结构一般意味着句子的结束。在这种结构后面再出现连词接完整的句子的，一般 为错误选项。
ypheroin 2016-01-31 10:16:43
做题时，认为只有an event 可以mark the end of……
入内有生 2015-09-20 22:55:39
an asteroid bigger than Mount Everest slammed into North America an event 做同位语。 that 做extinctions限定性修饰
JennyFeng1987 2015-06-05 22:16:20
that mark 的定语从句其实修饰的是extinctions, 前面的the plant and animal 是定语修饰extinctions
两个月无限可能 2014-11-23 07:10:45
常考察同位语，要注意，可以是前面整个句子的同位语
