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HP-SLM;HP-TIM;HP-LOM HP-TIM;HP-SLM;HP-LOM HP-SLM;HP-LOM;HP-TIM HP-LOM;HP-SLM;HP-TIM
Tim and Peter’s Tim's and Peter Tim's and Peter’s Tim and Peter
Tim’s parents asked him to play the piano every day. Tim and his parents would play the piano together. Tim had to practice playing the piano every day. to learn playing the piano is too hard for Tim.
where Tim was; was where is Tim; was where Tim is; was where Tim is; is
man cannot avoid destroying the environment man cannot obtain resources he needs from other planets man cannot survive for a long time man cannot help to create a new environment
could have left must have left can't come won't be coming
Tim and Peter's Tim's and Peter Tim's and Peter's Tim and Peter
could have left must have left can’t come won’t be coming
it is easy to do harm to our environment the planet on which man lives is too small for man to survive man should not create his culture and civilization too rapidly man does not want to admit the danger of what he has done to the environment
man cannot avoid destroying the environment man cannot obtain resources he needs from other planets man cannot survive for a long time man cannot help to create a new environment