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always watches has always watched has always been watching is always watching
have polluted is being polluted has been polluted have been polluted
run out of; we have run it out run out of ; our water has run out run out of; our water has been run out run out; our water has run out
was polluted was polluting had been polluted has been polluted
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
have sent have been sent has been sent has sent
have polluted is being polluted has been polluted have been polluted
run out of; we have run it out run out of; our water has run out run out of; our water has been run out run out; our water has run out
when the boiler has been secured long enough for most solids to settle when the boiler has been cooled to ambient temperature only after raising the water level to within 0.5 inch of the high water cutout only after bypassing the low pressure
complains always has always complained is always complaining has always been complaining
Fish and birds show residues of heavy metal. Toronto has grown salmon successfully in its waters. Farming has prospered in the lakeside areas. Lake water has been drawn for use by the population.
has been planted; from carrying away have been planted; carrying away have planted; being carrying away has been planted; from being carried away
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
had polluted has been polluted has polluted had been polluted
has been always considered has always been considered always has been considered has been considered always
have run out, run out of has run out, be used up
have been run out, run out of has been run out, use up
has polluted have been polluted has been polluted is being polluted
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