Complex Object.    

 Complex Subject; 

 would go;

went. 

will go

 had gone;

organized; 

 is organized

are organized;

organize

had been agreed;

 has been agreed; 

will have been agreed.  

 had agreed;

 its;

her.  

 she;

 he;

yours; 

you; 

your.

mine; 

 least musical;

musical;

 less musical. 

most cold;

 cold.  

 more cold; 

A business conference, a workshop, a seminar; 

 An international conference, a national conference; a round-table conference 

A trade conference, a symposium, an academic conference;

A symposium, a workshop, a round-table conference, a seminar.

Evaluation, information, review;    

Education, evaluation, recreation, inspiration, and presentation; 

Recreation, meeting, discussion;

presentation, experience, speech.