作业帮英语题 ,需要帮助（须分析）（ ）from other continents for millions of years, Australia has many plants and animals not found in any other country in the world. A.Being sparated B.Having separated C.Having been separated D.To be
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英语题 ,需要帮助（须分析）（ ）from other continents for millions of years, Australia has many plants and animals not found in any other country in the world. A.Being sparated B.Having separated C.Having been separated D.To be
英语题 ,需要帮助（须分析）
（ ）from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
A.Being sparated B.Having separated C.Having been separated
D.To be separated
请将每个选项分析一下,我对这4个选项的用法很模糊.应该在什么时候用呢?谢谢
英语题 ,需要帮助（须分析）（ ）from other continents for millions of years, Australia has many plants and animals not found in any other country in the world. A.Being sparated B.Having separated C.Having been separated D.To be
C 首先根据句子可知,前面需要的是作定语的 主语是Australia 所以明显seperate应用被动,故排除B
其实这个句子主要就是考时态,由for millions of years 很明显是个完成时态,所以必须选C
其中A 除了用了分语之外,只表示一般现在时,而D则是表示将来时才能用
我想你对这几个答案模糊,主要是因为你对时态的掌握不太透彻,所以加油
C~~
C
因为后面有for millions of years，是强调“已经”的意思，持续了一点时间的
A是强调现在的状态
B表主动，这里应该是被动的，被分隔，所以不对
D大部分是表将来，和表示目的，也不贴合题意
Choose C
You should use passive voice here,therefore you eliminate B.The original sentence states a past and continuous situation of Australia,D,which focuses on the future of it,is wrong.
"has" implies the effect of the former state of Australia,so A is wrong.