SENTENCE STRUCTURE

Different parts of the sentences were stuck all over the class. Students in random went to the walls and point what was missing in those.  They came up with the understanding that either the 1^st half or the 2^nd half was not there. 

Discussions further led to an understanding that every sentence contains two parts:  a subject and a predicate.  A subject is what or whom the sentence is about.  The predicate is the part of the sentence that tells something about the subject.