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Can we say

it is the data accessible by the system

or we must instead say

it is the data that are accessible by the system

  • Yes, it's called a reduced relative clause. But I think it depends on the sound. If it doesn't sound right, don't reduce it – user178049 Jun 8 '17 at 6:35
  • Thanks for your help. I'll be going through the page you gave. – Jepsenwan Jun 8 '17 at 6:39
3

Yes, you are correct in this.

To expand this answer, I am going to reference from the examples here

There can be 4 ways of using the reduced relative clause, which is what your question leads to: Omit the relative pronoun, Reduce an adjective clause to a participle phrase, Reduce an adjective clause to a prepositional phrase, and Reduce an adjective clause to an appositive

1. Omit the relative pronoun

You can omit the relative pronoun from the adjective clause when it is the object (A good rule to remember: If the word after the RP is a verb, you must have the RP there. If the word after the RP is not a verb, you probably don’t need it. )

For examples, I will talk to a consultant. I met him at a party. I will talk to a consultant whom I met at the party. I will talk to a consultant I met at the party. We will start our project soon. We finalized it last week. We will start our project which we finalized it last week soon. We will start our project we finalized it last week soon. However, you can't delete in this sentence. We can't finalize the project yet. It is very complicated. We can't finalize the project which is very complicated yet. We can't finalize the project very complicated yet.

2. Reduce an adjective clause to a participle phrase

Adjective clauses can often be reduced to phrases, but the relative pronoun (RP) must be the subject of the verb in the adjective clause.

a. delete RP + BE

For examples, The university that are investing on human resources will sustain in the future. The university investing on human resources will sustain in the future. The dean who was appointed yesterday graduated in the UK. The dean appointed yesterday graduated in the UK.

b. delete RP + (Auxiliary Verb) and change the Verb to VERB-ING

For examples, The students who do more research at home perform a lot better. The students doing more research at home perform a lot better. The students who experienced real working environment also learn faster. The students experiencing real working environment also learn faster.

3. Reduce an adjective clause to a prepositional phrase

Adjective clauses can often be reduced to phrases, but the relative pronoun (RP) must be the subject of the verb in the adjective clause.

For examples, Did you see the book that is on the table? Did you see the book on the table? She hasn't finished her paragraph which is about her best friend yet. She hasn't finished her paragraph about her best friend yet.

4. Reduce an adjective clause to an appositive

For examples, You who are students should plan about your future jobs. You students should plan about your future jobs. Piseth, who is a curriculum developer, has been working very hard. Piseth, a curriculum developer, has been working very hard.

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