英语语法题一道（有加分）The modern carpenter would be just as able to pr

这是一个省略句,由if连接两个句子.句子主干为The modern carpenter would be just as able .if （he is ） given.可以看出如果句子完全,应该在if后面从句会有主语和谓语（本句中为The modern carpenter is或he/she is）. 但是英语中为了避免重复,由连词连接两个句子时,后面句子与前面相同的成分经常会省略.
本句子就是一个经典句型,句中有连词（或相当于连词的"-------"和"；"）从句为主谓（宾）结构,并且从句主语和主句主语相同时,省略从句中主谓语.
The modern carpenter would be just as able to produce craftsmanship as the carpenter of fifty years ago if he is given proper tools and materials.
就变成了
The modern carpenter would be just as able to produce craftsmanship as the carpenter of fifty years ago if given proper tools and materials.
这就是答案的来源,故不会出现being的形式