这种情况,用单数IS还是复数ARE?

问题描述:

这种情况,用单数IS还是复数ARE?
How many copies of transcripts are required?
How many copies of transcripts is required?
可能是1也可能是2,那用is还是are?

谓语形式的单复数,要以how many 后面的词来决定,copies是复数,所以用are.