請教一個英文文法

Question

We are given just so much food ___ will keep us alive.

1. as

2. that

正瘸答案是as 但是我覺得that也可以 可否幫忙解說一下 謝謝

已更新項目:

如果用 that

some food 為先行詞 that當子句的主詞

所以後面形容詞句子: the food that will keep us alive.

這樣好像也說得通 不是嗎 @@"

當然 (just so much........as)是正確的用法

但是 我覺得好像 that 也可以!~ 不知道可否幫忙解釋一下

用that 文法哪裡出了錯誤

Answer 1

最佳解答

just so much ... as ...是指剛好和...一樣多

We are given just so much food as will keep us alive.

= We are given some food. The amount is just enough to keep us alive.

空格內無法放入that，因為和so much...連不上

We are given some food so that we may keep ourselves alive.

2011-05-29 21:48:15 補充：

that帶出來的形容詞子句是限定用法，其先行詞需加定冠詞。如

This is the food that will keep us alive.

some food不能當that子句的先行詞。因為數量和內容都不確定。

只能用不定詞片語來修飾，如：

We need some food to keep us alive.

應是寫成：We need some of the food that you bought yesterday.才能受到that子句的限定。

2011-05-29 21:55:08 補充：

更正：some food不能加that子句來修飾，應該是說food己經接受some在數量上做了限定，就不能再用that子句加以限定了。

Answer 2

抱歉阿 只能給一個 但真的也很謝謝你

Answer 3

We are given just so much food ___ will keep us alive.

是前面的so much 語意上的邏輯，使得這裡不得不用as，換成

We are given just enough food ___ will keep us alive.

就須用that想用as還不行，非關文法，事關語法。

I eat a car.文法上可沒錯，問題不會有人說這樣子的話呀。

She is that beautiful as her sister.文法上可有錯?可是寫這樣一定被算錯

不知道誰規定的，大家都寫She is as beautiful as her sister.不要去鑽文法的牛角尖了

這個 as 是準關代沒錯，有興趣可以看這裡