when did you know the accident I knew nothing about it ——the policeman told me A.whether B.if C.since D.until这四个词的区别?怎么用?2.i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike.A.will snow will snow B.

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when did you know the accident I knew nothing about it ——the policeman told me A.whether B.if C.since D.until这四个词的区别?怎么用?2.i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike.A.will snow will snow B.
when did you know the accident
I knew nothing about it ——the policeman told me
A.whether B.if C.since D.until
这四个词的区别?怎么用?
2.i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike.
A.will snow will snow
B.snows will snow
C.snows snows
D.will snow snows
为什么选D?

when did you know the accident I knew nothing about it ——the policeman told me A.whether B.if C.since D.until这四个词的区别?怎么用?2.i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike.A.will snow will snow B.
knew nothing about it ——the policeman told me
A.whether B.if C.since D.until
这四个词的区别?怎么用?
应该D.知道警察告诉我,我才知道这个事.
a.是否/什么时候 意思不符合
b.是否 意思不符合
c.自从 如果用它,应该是现在完成时.自从.时候我知道了.
d.至到
根据意思就可以判断了.
2.i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike.
A.will snow will snow
B.snows will snow
C.snows snows
D.will snow snows
为什么选D?
我不知道明天是否会下雨--根据中午就能判断是将来时了.
如果下了,我要骑自行车去学校.if后面虚拟,将来时,改为一般现在时.
其实时态和虚拟的问题,很多时候根据中文意识也能判断出来的.--技巧

A not until 直到...才
D will snow snows 下大雪

I knew nothing about it ——the policeman told me
A whether 相当于 if 如果、否则的意思,可以引导名词性从句
B if
C since 自从。。起 多出现在完成时,放在句首表示既然,可以引导原因状语。
D until 直到 , 多和 not 连用 表示知道什么时间才产生某种结果。
此题选 D

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I knew nothing about it ——the policeman told me
A whether 相当于 if 如果、否则的意思,可以引导名词性从句
B if
C since 自从。。起 多出现在完成时,放在句首表示既然,可以引导原因状语。
D until 直到 , 多和 not 连用 表示知道什么时间才产生某种结果。
此题选 D
i donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike。
为何选D 注意在第一个空 i donnot kown 和 if it ——tomorrow 其实是两各分句,if it ——tomorrow ,就直接理解成一般将来时 用 WILL+BE ,第二个空 if it ——,i wonnot go to school by bike。
这是一种一般现在时表示将来时,用一般现在是表示对将来可能发生的某种情况的猜测。
若按照虚拟语气的理解方法:
if it ——,i wonnot go to school by bike。if条件句用一般现在时(表示对将来某种情况的虚拟),主句用 Would/shold/will/could + BE.

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1 D not...until直到...才....
whether-是否 if-如果 since-自从
2 D主句一般现在时,从句一般将来时 第一个snow是动词
C从句一般将来时,主句一般现在时,后半句是前半句的逆用
不知道搂着明白没

1 D
意思是知道警察告诉我我才知道
2 D
前后两句都可以理解为主将从现

D。until
A.whether是否 B。if是否 C.since自从 D。until直到
if it ——tomorrow
if it ——,i wonnot go toif后面用一般现在是替代将来时,用snows

第一题:I knew nothing about it ——the policeman told me 前半部分意思是“我不知道关于它的任何事”;后半部分意思是“警察告诉我”
而选择的几个词:A.whether:意思为“(两者中的)哪一个;(两个中的)任何一个;是否” B。if(是否) C.since(自从) D。until(直到——为止;在——以前)只有选D意思才能通顺:“在警察告诉我以...

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第一题:I knew nothing about it ——the policeman told me 前半部分意思是“我不知道关于它的任何事”;后半部分意思是“警察告诉我”
而选择的几个词:A.whether:意思为“(两者中的)哪一个;(两个中的)任何一个;是否” B。if(是否) C.since(自从) D。until(直到——为止;在——以前)只有选D意思才能通顺:“在警察告诉我以前我一点都不知道关于它的任何事”
第二题:I donnot kown if it ——tomorrow ,if it ——,i wonnot go to school by bike。 意思是“我不知道明天是否会下雪,如果下雪,我就不骑自行车去学校。”明天是否会下雪,选将来时,所以先排除B和C;如果下雪,这句话是承接上句而说的,而上句已经用了将来时了所以这里不再重复使用,同时,“it”是第三人称单数,所以在动词后要加—S,因此这题选D。
希望我说的你能理解,祝你进步。

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