在线等!!!高手帮帮忙看看这句语法。。。。

Question

Favours will only be done when there is a clear benefit, an immediate return to the giver, rather than being a matter of communal obligation.,不懂rather than being a matter of communal obligation.的语法结构是怎样的。。。。也不懂意思。。 = =为什么是being呢。。。。崩溃

Answer 1

原话是：
Favours will only be done where there is a clear quid pro quo -where there is a clear and immediate benefit to doing so.

Quid pro quo ("this for that" in Latin[1]) most often means a more-or-less equal exchange or substitution of goods or services. English speakers often use the term to mean "a favor for a favor" and the phrases with almost identical meaning include: "barter", "give and take", "tit for tat", "this for that", and "you scratch my back, and I'll scratch yours."

楼主要理解句意，首先要知道成语：Do sb. a favor. 帮某人一个忙。及被动语态。
原句避免了这个拉丁语成语，直接用 a clear benefit 来代替，并用一个同位语来进一步解释：an immediate return to the giver, 不知道前文，大该是说：人们就会这么做，而不是那么做。
也就是说，人们会变得很功利！要我帮忙？行，有什么好处？要明确，而且要马上给！不则，没门！
原句用where表示“在。。。情形下”，而本句改为when表示“当。。。时候”，意思差不太多。when也有译作“在。。。。情况下”的。
rather than “而不是”，相当于instead of ,后用动名词短语，很正常。
试译：
Favours will only be done when there is a clear benefit, an immediate return to the giver, rather than being a matter of communal obligation.
只有见到明确的好处，有立刻的回报时才会给人帮忙，而不是出于社会责任感。

Answer 2

只有见到明确的好处，有立刻的回报时才会给人帮忙，而不是出于社会责任感。
rather than是“而不是”，是短语介系词，介系词之后碰到动词要用动名词being。希望我能帮助你解疑释惑。

Answer 3

rather than 的一个用法是类似于介词，后面跟上动名词，用being 就不见怪了。

Answer 4

帮助会被给予 只要当这儿有明显的好处：对给与者的立刻的回报 ，而不是因为一种社会责任感而被给与。being 。。。动名词短语 有名词的性质这相当于名词