The lake is so deep that it is dangerous______a.to swim in b.swim in c.to swim d.swimming答案選c,為什么不能選a

熱心網友

The lake is so deep that it is dangerous______a。to swim in b。swim in c。to swim d。swimming本題答案應該選A,而不是C。原答案有誤。看兩對句子:It is dangerous to stand on that chair。That chair is dangerous to stand on。It is difficult to understand him。He is difficult to understand。從上面兩對句子中,不難發現,若動詞是及物的,則直接將動詞后面的賓語提到句子的開頭,作主語。若動詞為不及物,在將后面名詞提到句子開頭作主語的同時,不及物動詞后面的介詞要保留在原位置上。"it is dangerours to ___________。"這里的it實際上指的是"the lake",所以必須選A,才能表達出"在此河"游泳的意思。The lake is so deep that it is dangerous to swim in。這條河如此深,以至于在河里游泳非常危險。。

熱心網友

是答案錯了咯,應該是：The lake is so deep that it is dangerous to swim in.so...that... 如此...以致...that 引導結果狀語從句，it是形式主語，真正的主語是to swim in (the lake),相當于To swim in the lake is dangerous.

熱心網友

因為前面的先行詞是 that所以前面可以省略掉in, 這是傾向于口語的一種用法.如是which, 就更正式一些.就不可以省略了,可以用A to swim in了.

熱心網友

語感 in又不是和swim構成固定搭配拉