1.We should protect plants,________?(反义疑问句）

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1.We should protect plants,________?(反义疑问句）
2.-Could you tell me (where they have been)?I must find them.
-Sorry,but they were in the classroom just now.
(请问括号里的为什么不能用 where they have gone?)
3.If I knew the answer to the maths question,I (told you) soon
(请问括号里为什么不填 will tell you?)
wachief 我也是你那样想的到底是怎样的呢。

1.should not we?
2.因为括号里的句子是现在完成时,而此处的完成时只能用持续性动词,而go是瞬间动词,所以只能用been
3.if 引导的条件状语从句,主句用一般现在时表将来,所以不能用will tell you ,而且,if 从句是过去时,主句不可能用will,另外,此句是虚拟语气.

We should protect the animals and plants , ____ ____?反意疑问句 we should protect the Earth.改成一般疑问句 should的反义疑问句 17.We should love n_______ and protect it.18.We are ________ its fun （改为反义疑问句） its fun ,________ ________ Why should we protect trees We should use（） plastic bags to protect our environment. We should love n_______ and protect (保护）it. 1.The wather was warm yesterday________ ________?(改为反义疑问句） Nothing happened on the first day.________?（反义疑问句） I should go with Tom,-------?(反义疑问句）作文：we should protect natural resources