没有缺任何成分。它是一个由 疑问代词或疑问副词＋ 不定式做宾语.只不过多了一个借此短语 for the broken glass 。 如 I don't know who/whom to elect. 其他还有： he didn't know what to do. I don't know where to go for sightseeing. I know how to make a pizza.
这句话不缺什么,它的意思是"他不知道为那个破玻璃（杯）而责怪谁".不定式的复合结构who to blame 作谓语didn't know的宾语,相当于一个宾语从句who he should blame 作谓语didn't know的宾语．因此，原句可理解为：He didn't know who he should blame for the broken glass.
hedidnotknowWHOTOBLAMEforthebrokenglassblame用作及物动词时, rsth./doingsth.为某事责备某人/责备某人做了某事。blamesth.onsb.把某事归咎于某人.betoblame(for)应(为……)承担责任;该(为……)受责备。不能用被动语态. toblame:该怪...
for the broken glass, he did not know who to blame. 玻璃破了，他不知道是谁干的。 很简单的，只是理解起来，这里有个不定式短语，是由who引导的。
be blame for
答：最关键的是像素，同尺寸的话，像素高者贵。详情>>
答：详情>>
