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1)He walks home-Simple present
2)He reads a book.
3)He travels by bus. 
4)This book belongs to Latha.
5)I am happy

1)I got the book yesterday.-Simple past.
2)We went to Kanyakumari last month.
3)Leela wrote to her Uncle last month.
4)Sumitra passed the examination last year.
5)She played tennis when she was in Chennai. 

1)They have been singing a song-Present participle
2)They have been travelling for last four days.
3)He wasted money by buying a video game.
4)Knowing that his mother will scold ,Aravind cleaned his room.
5)They have been eating.