Results 1 to 5 of 5
    • Member Info
      • Native Language:
      • Chinese
      • Home Country:
      • China
      • Current Location:
      • China

    • Join Date: Jul 2007
    • Posts: 812
    #1

    sentence

    Over a large number of trials, the probability of an event to occur is equal to the probability that it will not occur.

    Over a large number of trials, the probability of an event occuring is equal to the probability that it will not occur.

    Which one is right? Please.


    • Join Date: Nov 2007
    • Posts: 5,409
    #2

    Re: sentence

    Over a large number of trials, the probability of an event occurring is equal to the probability that it will not occur.

    (assuming there are two possible outcomes.)

    • Member Info
      • Native Language:
      • Chinese
      • Home Country:
      • China
      • Current Location:
      • China

    • Join Date: Jul 2007
    • Posts: 812
    #3

    Re: sentence

    Over a large number of trials, the probability of event to occur is equal to the probability that it will not occur.
    I can't understand why "of event to occur' is wrong?


    Over a large number of trials, the probability for an event to occur is equal to the probability that it will not occur.
    Over a large number of trials, the probability of an event occuring is equal to the probability that it will not occur.
    Now, the two sentence mean the same?

    Please.
    Last edited by puzzle; 31-Mar-2009 at 08:05.


    • Join Date: Apr 2008
    • Posts: 1,571
    #4

    Re: sentence

    Quote Originally Posted by puzzle View Post
    Over a large number of trials, the probability of event to occur is equal to the probability that it will not occur.
    I can't understand why "of event to occur' is wrong?


    Over a large number of trials, the probability for an event to occur is equal to the probability that it will not occur.
    Over a large number of trials, the probability of an event occuring is equal to the probability that it will not occur.
    Now, the two sentence mean the same?

    Please.
    Nouns can be modified by attributes in post-position. Some nouns require infinitives to be used in that function, some nouns require gerunds, some admit of both.
    E.g. He had an impulse to run away.
    He didn't like the idea of travelling abroad.
    He had a good opportunity to make / for making a career.

    Besides stand alone infinitives or gerunds in such constructions, you can also have complexes, i.e. noun/pronoun + infinitive or gerund:
    e.g. for Tom to come, for him to go
    Tom's coming, his going
    It's a good opportunity for him to sign the contract.
    I don't like the idea of his going abroad.

    In your sentence you have such a complex used as an attribute for the noun 'probability': an event occurring. 'Probability' belongs to the group of nouns that require a gerund to be used as postpositional attribute.


    • Join Date: Nov 2007
    • Posts: 5,409
    #5

    Re: sentence

    Look at your sentence this way:
    Over a large number of trials of an event, the probability to occur is equal to the probability that it will not occur.

    Does that sound right to you?

    OR
    Over a large number of trials of an event, the probability of occurring is equal to the probability that it will not occur.
    'of' is a prepostion requiring a noun - here, a verbal noun - 'occurring'.

    This still hold true when we recast the sentence as you had it:
    Over a large number of trials, the probability of an event occurring is equal to the probability that it will not occur.
    (one of the 'of's is no longer necessary)

Similar Threads

  1. A question about using "that" in a sentence
    By Unregistered in forum Ask a Teacher
    Replies: 3
    Last Post: 03-Nov-2009, 13:05
  2. the whole sentence used as a noun
    By hamoodee in forum Ask a Teacher
    Replies: 3
    Last Post: 09-Oct-2006, 16:55
  3. Replies: 1
    Last Post: 13-Sep-2006, 14:07
  4. Attributive Clause - China Needs Your Help
    By ChinaDavid in forum Ask a Teacher
    Replies: 5
    Last Post: 09-Jan-2005, 16:56
  5. grammar
    By jiang in forum Ask a Teacher
    Replies: 8
    Last Post: 17-Dec-2003, 20:02

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •