aretohavedoneThesevariouscontextsarealllikelytohaveexertedsomeinfluenceinshapingourattitude.句中其他我都明白但是这个betohavedone真的很少见,查来查去都不晓得到底要表达一个什么意思?betohavedone

Question

are to have done
These various contexts are all likely to have exerted some influence in shaping our attitude.
句中其他我都明白
但是这个be to have done真的很少见,查来查去都不晓得到底要表达一个什么意思?
be to have done是不成立的……这句没看懂啊，楼下的同学。这是书上原话应该不会错的
但是这种用法真的很少见。所以我搞不懂。
all likely分明做状语修饰to have done吗，去掉也可以成立吧？
所以原句我理解是可以缩减为下面这个句子的：
These various contexts are to have exerted some influence in shaping our attitude.
那么这个are to have done
到底是嘛意思啊
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不过还是不大懂……

Answer 1

专门去查be to have done一般是查不出来的 be to 表将来,have done表完成,两者矛盾 .
而这个句子里面主要是套用了are likely to do这个词组,解释为有可能做某事 .
are all likely to have exerted 就解释为有可能已经施加了 .