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have visited visited had visited had been visiting
have polluted is being polluted has been polluted have been polluted
Me，too Me neither So have I So I have
given out; we have run it out run out of; our water has run out used up; our water has been run out run out; our water is running out
will give would have been must give should have given
have polluted is being polluted has been polluted have been polluted
have polluted is being polluted has been polluted have been polluted
will give would have been must give should have given
I would be here I have been here I had been here I would have been here
I would be here I have been here I had been here I would have been here
Natural barriers to sea water have been destroyed, The water table has gone down after droughts. Sea level has been continuously rising. Evaporation of water leaves salt behind.
have sent have been sent has sent has been sent
have polluted is being polluted has been polluted have been polluted
have polluted is being polluted has been polluted have been polluted
will be would have been would be have been
So have Neither have So do So am
have been polluted is being polluted have polluted has been polluted
Have；gone to Have；been to Did；go to Have；been in
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