Question

请教几个英语句子中的小问题。

1.The obvious reason why these two companies bargained with each other over the imported products is just that they both intended to benefit from these products after estimating their real value.（over the imported products 为什么用over不是用in？为什么这里是 is just that不是was just that）
2.To make herself understood, the interpreter was busy explaining carefully the terms involved in the contract and how they accounted for the profits.（the interpreter was busy explaining carefully the terms 中为什么要用过去进行时？carefully为什么可以放到the terms前而不是the interpreter was busy explaining the terms involved in the contract and how they accounted for the profits carefully ？ ）

Answer 1

用in肯定是不恰当的，in通常指在某个领域或某种形势或特征，over有"关于"的意思，但是这里用over体现什么感情色彩还需要请教高人，我理解为"基于"。整句话主体是The reason is just that…这是一般陈述句，所以不用was。你看到的过去式是在从句中出现的。
第二句，be busy doing和be busy with something是两个常用搭配，忙于做某事。为什么不能用过去进行时？？和上下文没有冲突就没问题。
carefully是副词，位置很灵活，可以放在句尾，句首，也可以放在被修饰动词前，句中的位置可能是觉得放在句尾距离动词太远了。

追问

那么请问用on可以吗？about呢？

追答

我找不到依据，不好乱说。本能感觉abonut不合适，感觉关系太松散，具体原因说不上来。