Student or Learner
I remember being taught that we can cut down relative pronoun (which, who,where...) in some situations such as when the noun it modifies is an object. Can anyone please remind me in what situations else can we cut down relative pronoun?
I look forward to your replies.
I found some sentences that are cut down relative pronouns even the nouns they modify are subjects:
The last time my father gone fishing was in May 2000.
'Tien Quan Ca', the Vietnam National Anthem, written in 1944.
Especially, 'be' is also cut down in the second sentence.
Can anyone summary when can we cut down relative pronoun and to be?
Ellipsis is possible where the relative pronoun functions either as direct object or complement, but not where it functions as subject. Hence
 This is the man that I saw in the park.
can be condensed to
[1a] This is the man I saw in the park.
 He is not the person that he once was.
[2a] He is not the person he once was.
 This is the lady that phoned last night.
cannot be condensed to
[3a] *This is the lady phoned last night.