关于英语倒装的几道问题

________ new data on this subject.
A. Presenting in the paper are B. Presenting in the paper is C. Presented in the paper are D. Presented in the paper is

They would certainly have come and helped us _______time.
A. did they have B. had they had C. had they have D. would they have

_______today , he would get there by Friday.
A. Would he leave B. Were he leaving C. Were he to leave D. Had he left

Nowhere else along the coast _______such shallow water so far from bland.
A. is there B. there is C. it is D. is it

Man may disappear ________other creatures who become too specialized to survive their environment.
A. as B. just as C. as if D. as have
正确答案是 CDCAD
但我未理解
请告诉我您的解题思路

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第一题,是全部倒装，全部倒装有两种情况，一是表示方位地点顺序的介词短语置于句首时要倒装；而是表示强调某个成分要全部倒装；你自己看看此题是不是符合这些情况。
第二题，你少打了逗号。题译为：“如果他们有时间他们才能来帮我，”条件句中省略了if,而且还是对将来的虚拟，所以要把would提前来倒装！
第三题，从句意思是他今天如果今天离开，是还没离开，是对将来的虚拟，对将来的虚拟，应该用were to 加动词原形或者would一系列的词加动词原形；但当省略if时，谓语动词要倒装，即把谓语动词提前！
第四题，否定副词或连词置于句首需要倒装，而且根据意思，只能用there be动词才对啊！
第五题，考的是as引导的让步状语从句，把as后的成分提前。根据句意，后面从句谓语动词缺少have,所以D

1.C
__Presented in the paper are ___ new data on this subject.

正常语序是：New data on this subject are presented in the paper. data 为 datum 的复数,所以动词要用复数形式，而不是单数。
presented in the paper是表语，表语提前至句首时，句子的主谓要倒装。