The how-to book can be of help to___wants to do the job

问题描述:

The how-to book can be of help to___wants to do the job
A.who B.whomever C.No matter who D.whoever
介词后面不是着能用whom吗,为啥不是whomever?

因为在___wants to do the job这句话中,需要一个主语,而whomever是宾格形式,不能做主语.
whoever在句中并不做to的宾语,可以看成whoever wants to do the job 这个句子做to的宾语.