When deeply absorbed in work,_which_ he often was,he would forget all about eating or sleeping.

问题描述:

When deeply absorbed in work,_which_ he often was,he would forget all about eating or sleeping.
请问which的先行词是哪个,为什么,

z指代When deeply absorbed in work
which可指代前面整句话的内容,这是语法规则.When deeply absorbed in work这一句好像少了成分,为什么可以这样省略=When he is deeply absorbed in work
英语中,过去分词作状语时,有时为了使条件、时间等一目了然,可以在分词前加when/while/if/unless等,往往可转换成一个从句,由于过去分词表被动,所以,从句为被动语态。
祝你进步!应该=When he was deeply absorbed in work,
因为which_ he often was是过去式,对吧when he is/ was...均可