1.we will go shopping if it___ tomorrowA.don't rain B.didn't rainC.doesn't rain D.isn't rain2.He said the sun___ in the east and __in the westA.rose set B.rises sets

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1.we will go shopping if it___ tomorrowA.don't rain B.didn't rainC.doesn't rain D.isn't rain2.He said the sun___ in the east and __in the westA.rose set B.rises sets

1.we will go shopping if it___ tomorrowA.don't rain B.didn't rainC.doesn't rain D.isn't rain2.He said the sun___ in the east and __in the westA.rose set B.rises sets
1.we will go shopping if it___ tomorrow
A.don't rain B.didn't rain
C.doesn't rain D.isn't rain
2.He said the sun___ in the east and __in the west
A.rose set B.rises sets

1.we will go shopping if it___ tomorrowA.don't rain B.didn't rainC.doesn't rain D.isn't rain2.He said the sun___ in the east and __in the westA.rose set B.rises sets
D isn't 表示将来
B 虽然前面是过去式,但是sun rise是一个永远不变的事情,所以不会随时态改变.

c原因 主将从现
b原因 自然事实 用三单

C.条件状语从句主句将来时,从句一般现在时.rain是动词.所以用助动词doesn't
D.固定的事实用一般现在时

C 主将从现
B 客观真理,用现在时

1.C.doesn't rain 主句将来时,从句一般现在是。
2. B.rises sets 客观真理,客观事实永远用一般现在时态

1:选C,是if it rains的否定形式。
解释:宾语从句中,从句用一般将来时,主句要用一般现在时代替
2:B描述自然现象的,都用一般现在时.