On preposition advance in attributive clause October 1, 1949 is the day. The people & # 39; s Republic of China was founded on & nbsp; October 1, 1949 is the day when (= on which) the people & # 39; s Republic of China was founded on & nbsp; October 1, 1949; ll never forget the time. We worked on the farm during the time.---I' ll never forget the time when(=during which) we worked on the farm.I recently went to the town. I was born in the town.---I recently went to the town. where(=in which) I was born.The Reason why (= for which) he was late was that he missed his train, Who, who, who, when, where and why can be omitted when they are used as conjunctions in attributive clauses?

On preposition advance in attributive clause October 1, 1949 is the day. The people & # 39; s Republic of China was founded on & nbsp; October 1, 1949 is the day when (= on which) the people & # 39; s Republic of China was founded on & nbsp; October 1, 1949; ll never forget the time. We worked on the farm during the time.---I' ll never forget the time when(=during which) we worked on the farm.I recently went to the town. I was born in the town.---I recently went to the town. where(=in which) I was born.The Reason why (= for which) he was late was that he missed his train, Who, who, who, when, where and why can be omitted when they are used as conjunctions in attributive clauses?

Attributive clause guided by preposition + relative pronoun
We should pay attention to the following points in the attributive clause guided by preposition and relative pronoun
1. In the attributive clause guided by "preposition + relative pronoun", the object of preposition can only use which (referring to object) and who (referring to person), that is, preposition + which / who. Not that and who
E.g. this is the teacher from whom we've learned a lot
Great changes have taken place in the city in which we live
2. Sometimes prepositions can be put at the end of clauses. In this case, the relative pronouns can be which / that, who / who / that, or omitted
e. G. the situation (which / that) we had got into was very dangerous
The man (who / who / that) you were talking to just now is my English teacher
3. When the predicate verb phrase in the attributive clause is fixed collocation and indivisible, the preposition in the verb phrase cannot be preposed
This is the pen which I'm looking for
This is the pen for which I'm looking
4. Attributive clauses can also be derived from "noun / pronoun / numeral + preposition + which / whom"
The old man has two sons, one of whom is a doctor
The house, the windows of which (= which windows = of which the windows) were damaged, has now been repaired
5. The relative adverb (when, where, why) of the leading attributive clause can be replaced by "preposition + relative pronoun"
E.g. I'll never forget the day when I joined the party
The factory where my father works is in the east of the city
None of us know the reason why Tom was absent from the meeting. (why = for which)
6. Attributive clauses guided by "compound prepositional phrase + which" are often separated from antecedents by commas, and attributive clauses are often inverted
He lived in a big house, in front of which stock a big tall tree