EAP 140 PM - WANG, Lingshan - Week 3 2/4

      In an English sentence, we can't use both noun and pronoun to perform the same grammatical function.
In English sentence, the subject can't repeat itself.
e.g.  English it a common language.
     We can't use it here, because this word repeat the subject English.
In English sentence, between the subject and the verb, sometimes will have a word group.  But we can't add a pronoun.
e.g.  The boy who I saw he was a swimmer.
     We can't put he between the subject and verb, because this word repeat the subject a swimmer.
     Some language allow "topic fronting," put a word or phrase used as a "topic" at the beginning of a sentence and following it with an independent clause to explains something about the topic.  But we can't use this way in an English sentence.
e.g.  The dog I fed it in the morning.  (WRONG)
      I fed the dog in the morning.  (RIGHT)
     In an English sentence,It is wrong to repeat an object or an adverb in an adjective clause.
     Adj. clause begin with relative pronoun(who, whom, whose, which,that) or relative verb(when,where).  In an English sentence, relative pronoun usually help to introduce subjects or objects in the clauses.
e.g.  The boy ran after a girl who played in the garden.