if it were not for the protection we get from insect-eating animals这句话是什么事 我又两点不理解 一个 it 到底代表什么是什么语法 2 for在这里是什么意思

------------for the heavy rain.i should have been here earlier A if it were not B were it notC had it not been D if it wasn't If it had not been for与If it were not for有什么区别? Were it not for ______ his advice,we'd better have been cheated.A.If you don't give us B.Had it not been for C.If it were not for D.Should it not for 把If it weren't for their support,we would be in a diffcult situation.的条件句的weren't提前.是Weren't it for their support还是were it not for their support 把If it weren't for their support,we would be in a diffcult situation.的条件句的weren't提前.是Weren't it for their support还是were it not for their support 英语虚拟语态选择题1.------be sent to work iin the northeast?A.who do you suggestthat shouldB.who do you suggest2.------the expense ,I ------to canada.a.were it not for,would gob.if it were not ,goc.were't it for ,will god.if it hadn't been,w _____ the clouds ,you would find the airplane in the sky easily.A Had it not been for B If it were not C If it had not been for D Were it not for选什么?为什么? 英语17.If it were not for the fact that she _______ sing,I would invite her to the party.17.If it were not for the fact that she _______ sing,I would invite her to the party.a.couldn’t b.shouldn’t c.can’t d.might not 为什么 英语语法：____ the expense,I ____ a round-the-world tour.A.Were it not … would take B.If it were not… takeC.Weren't it for… will take D.If it hadn't been for… would have taken 求教英语语法选择 _____ the expense,I _____ to Italy._____ the expense,I _____ to Italy.A.If it were not,goB.Were it not for,would goC.Weren't it for,will goD.If it hadn't been,would have gone请翻译一下这句话,我知道应该选B,可是 If it were not for… If it had not been for … but for… 有什么关系和区别,请高手详细讲解,谢谢 If it ___ for the help of our teacher ,we would not have made so much progress.A were not B has not been C isn't D had not been为什么 If it were not for the fact that she_____ sing,I would invite her to the party.A.couldn't B.shouldn't C.can't D.might not答案是什么,为什么呢?我选的也是A,不明所以~ ●高一英语望详解If it were not for the fact that she_______sing,I would invite her to the party.A.couldn’t B.shouldn’t C.can’t D.might not If it were not for the fact that she ___sing,I should invite her to the party.A.couldn't B.shouldn't C.can't D.might not If it were not for the fact that she _________ sing,l would invite her to the party.A．couldn’t B．shouldn’t C．can’t D．might not If it were not for the fact that she _____ sing,I would invite her to the party.[ ]A.couldn't B.shouldn't C.can't D.might not 请解释每一个选项.