高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating 7) ____in this

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高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba.   A) being cultivated    B) been cultivated    C)having cultivated   D) cultivating     7) ____in this

高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating 7) ____in this
高中英语,求详细解题步骤谢谢!
6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating
7) ____in this way, the situation doesn't seem so disappointing. (CET-4 2000,1)
A) To look B) Looking at C) Looked at D) To be looked at
8) You will see this product ____ wherever you go. (CET-4 2000,6)
A) to be advertised B) advertised C) advertise D) advertising
9) ____in a recent science competition, the three students were awarded scholarship totaling 21,000 dollars. (CET-4 2000,12)
A) To be judged the best B)shavingsjudged the best C) Judged the best D) Judging the best
10) From the dates ____ on the plates, we decided that they were made in Song Dynasty.
A) marking B)having been marked C) marked D) to be marked

高中英语,求详细解题步骤谢谢!6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. A) being cultivated B) been cultivated C)having cultivated D) cultivating 7) ____in this
做非谓语动词题目的经典思维方式:一、确定空格处是谓语动词还是非谓语动词;二、如果是非谓语动词,要看它与逻辑主语是主动关系还是被动关系;三、看时间:过去的用过去式,现在的用进行式,将来的用不定式.
另外,非谓语动词如果作状语,它的逻辑主语就是句子的主语;如果作定语,它的逻辑主语就是它所修饰的名词;如果作宾语补足语,它的逻辑主语就是宾语.
6.A cultivate在句子中作宾语补足语,故其逻辑主语是it,即corn.corn和cultivate是被动关系,排除C、D;B项不全,应当是having been cultivated.
7.C look at在句子中作方式状语,故其逻辑主语是the situation,两者是被动关系,排除A、B;look at不是将来的时间,排除D.
8.B advertise在句子中作宾语补足语,与它的逻辑主语product是被动关系,排除C、D;advertise不是将来的动作,排除A.
9.C judge在句中作状语,与逻辑主语the three students是被动关系,排除B、D;动作不是将来发生的,排除A.
10.C mark在句中作定语,修饰dates,它与dates是被动关系,排除A;mark是过去发生的动作,排除D;having been done有时与done可以互换,但前者更强调动作是在过去发生的,且发生过多次,根据这一分析,排除B.

三长一短选最短,三短一长选最长,长短一样就选C

你好!这几个题都涉及非谓语动词的用法。在答题时可以使用“淘汰法”,即去掉错误的,剩下的就是正确的答案。
第6题:it 指玉米,cultivate 是种植,两者之间肯定是被动关系,所以只能在A、B中选一个。A是现在分词,表示正在发生的事,B是过去分词,表示过去发生的事。对于谓语动词found而言,种植是当时正在发生的事,即哥伦布当时看到印第安人正在种植玉米,所以应该选A。
第7题:句...

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你好!这几个题都涉及非谓语动词的用法。在答题时可以使用“淘汰法”,即去掉错误的,剩下的就是正确的答案。
第6题:it 指玉米,cultivate 是种植,两者之间肯定是被动关系,所以只能在A、B中选一个。A是现在分词,表示正在发生的事,B是过去分词,表示过去发生的事。对于谓语动词found而言,种植是当时正在发生的事,即哥伦布当时看到印第安人正在种植玉米,所以应该选A。
第7题:句首是“从这方面来看”,句子的主语是“局面”,与这个“看”之间是被动关系,所以应该用过去分词,即选C。选项D也有被动含义,但是它是不定式,不定式放在句首一般作目的状语,而句子需要的是条件状语,即“如果从这方面来看”,所以D不能用。
第8题:“产品”与“做广告宣传”之间是被动关系,所以只能在A、B中选一个。A是带to的不定式,而谓语是see,属于“感官动词”,在感官动词后面,如果是不定式作宾补,是不要带to的,所以A是错的。只剩B是唯一可选者。
第9题:空白处是“评选”,句子的主语是“三个学生”,两者之间是被动关系,所以只能在A、C中选一个。A是不定式,不定式放在句首一般作目的状语,与句意不符,所以应该选C。
第10题:句首是“从标记在盘子上的日期来看”,日期与标记之间是被动关系,所以A首先被淘汰。标记是日期的后置定语,标记是已经完成的动作,用过去分词最适合,所以应该选C。
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