By this time,a Lancaster bomber in reasonable coindition was rare and worth rescuing最后rescue为什么是ing 形式,如果说是be worth doing,那么be动词在哪里,只有一个worth doing啊,这到底是怎么理解
问题描述：
By this time,a Lancaster bomber in reasonable coindition was rare and worth rescuing
最后rescue为什么是ing 形式,如果说是be worth doing,那么be动词在哪里,只有一个worth doing啊,这到底是怎么理解
答
be worth doing
值得做某事。
答
这里的省略了一个was
By this time,a Lancaster bomber in reasonable coindition was rare and worth rescuing=
By this time,a Lancaster bomber in reasonable coindition was rare and it was worth rescuing
答
be 就是前面的 was
rare跟worth rescuing是并列的.