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A． In fact At least At one time As a result
built was built is built will be buil
helped was helping had helped have been helping
would have helped could have helped should have helped might have helped
would help would have helped had helped helped
a. In fact At least At one time As a result
helped was helping had helped have been helping
did I help other people do I helped other people I helped other people helping other people
plant planted planting plants
helped was helping had helped have been helping
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The telephone has helped to save people from illness and fire. The telephone has helped to prevent wars and conflicts. The telephone has made the modern city neither better nor worse. The telephone has had positive as well as negative effects on us.
our yourselves us, yourselves you, ourselves us, ourselves
helping out helped out helping to be helped
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