Student or Learner
I don't quite understand why some words in English should be in the past participle.
Yeah, the trees that don't fulfill their Christmas destiny are thrown in the chipper.Is this seat taken?Don't we need has/have in the past participle? If so, why those examples don't have it?I shouldn’t expect and fully demand all my planes be flown by robots and computers.
The are passive construction.
The passive voice is constructed with part of BE and the third form (past participle) of the verb.