Question

i was not to bother Mr.Hornby, __ I knew that a man in his position could ....

答案是as, 求解释because这里为什么不可用.

Answer 1

becasue 表示“肯定的原因”，没有猜测在里面。

而这句话中型消核用了个“could”表明有猜测之意，是可能的意思，而不是能够的意思，所以用as，as表原因时有猜测之意，跟for表原因类似。例如：
there is water everywhere, because it has rained. 因为下过雨，卜掘所以到处都是桥敏水
There is water everywhere, for ( as ) it has rained.到处都是水，大概是下过雨了吧

Answer 2

I was not to bother Mr.Hornby as I knew that a man in his position could .... 对的
I was not to bother Mr.Hornby because I knew that a man in his position could .... 也是对的
I was not to bother Mr.Hornby， because I knew that a man in his position could .... 是不让茄对的
因为逗号在前面， because 不卜滑轮能引导型信后面的部分。

Answer 3

因为这是句中，because不能用于句中

Answer 4

as是用于语气比较弱的情况，而且是顺接的。because语气是比较强的

Answer 5

因为because前不应有逗号。（外教在写作课上教过的）