作业帮__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,w...__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,while i was performing D,to perform 理由是前后主语不
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__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,w...__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,while i was performing D,to perform 理由是前后主语不
__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,w...
__experiments on the laboratoy,it started to rain heavily.
A,while performing B,performing
C,while i was performing D,to perform 理由是前后主语不一致,这也能解释得通.可这样不是就有两个谓语了吗（was 和 started ）.如果按以下这道题分析这个题,不是该选B或A吗：Some students ran back to the dormitory ,magezines___under their arms.
A.to be held B.was held
C.held D.holding
分析：此问题只有一个逗号为简单句,所以只能有一个谓语动词,前面已经有ran作谓语了,
因此空格内只能使用非谓语动词
__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,w...__experiments on the laboratoy,it started to rain heavily.A,while performing B,performing C,while i was performing D,to perform 理由是前后主语不
1 __experiments on the laboratoy,it started to rain heavily.
A,while performing B,performing
C,while i was performing D,to perform 答案选C
解析：这个题目确实因为主语不一致,下面依次分析各选项.
A while 是连词,后面需要接句子,而performing是现在分词,不能作谓语,淘汰.
B 现在分词,表主动,但是整个句子的主语是it,和perform之间没有关系,因为是人才能perform,it不能做其形式主语,淘汰B
C while 连词 引导时间状语从句.正确.因为有while引导,所以这个是主从复合句,而不是一个简单句,所以不存在两个谓语的问题
D动词不定式表将来,同B的理由一样it 同样不能做这个动词不定式的形式主语.
2 Some students ran back to the dormitory ,magezines___under their arms.
A.to be held B.was held
C.held D.holding
解析：此问题只有一个逗号为简单句,所以只能有一个谓语动词,前面已经有ran作谓语了,
因此空格内只能使用非谓语动词.这解释都是正确的.
需要补充的是,和上面的区别是这个句子没有连词,而上个句子有连词while.所以这里使用非谓语动词.而且要判断非谓语动词和其主语之间的关系.
选C,名词+过去分词 我们称之为独立主格结构.意思是非谓语动词的主语和整个句子的主语不一致的情况下,同时也没有连词.非谓语动词和其主语有形式上的主谓关系.
因为magezines 与hold 之间是被动关系,杂志是被拿在手里的,所以选择被动.B有谓语动词was 造成双谓语,错误
不知是否清楚,