In an effort to reduce their inventories, Italian vintners have cut prices;their wines have been priced to sell, and they are.
a.have been priced to sell, and they are
b.are priced to sell, and they have
c.are priced to sell, and they do
d. are being priced to sell, and have
e. had been priced to sell and they have

OG11中D的解释:  Have would require sold to complete it, not sell; omitting the subject they means that the comma should be omitted as well

有这种说法吗？好像印象中"， but + V" 经常有的啊，难道我一直搞错？

谁能帮忙回答一下啊... 

主谓宾，but主谓宾

主谓宾but谓宾

主谓宾，but谓宾

这三种形式对吗？更具上面og的解释，意思是说2对，3不对？我迷糊了

一般来说,连词加逗号才能连接句子,但是不绝对化

如果不是句子并列,就不加逗号

当然,说的都是两者的并列

我理解这个D中的have只能是和sell并列的，所以有comma就不对了。

主谓宾，but主谓宾

主谓宾but谓宾

主谓宾，but谓宾

当然都对，但是此题里并没有宾语啊。所以have对等的是所谓的“宾”，而不是“谓”，它只能是那个不定式的一部分。故,没不能有comma。因为没有所谓to do, and do的形式，只能是to do and do.

主谓（宾），and主谓（宾）

主谓（宾）and谓（宾）

主谓宾and宾