Passage: Senator Barbara Boxer, the California Democrat who is chairwoman of the Environment and Public Works Committee, shepherded the highway bill. "We are growing in number," said Senator Amy Klobuchar, Democrat of Minnesota.
What event has already finished? What event has begun but has not finished? What will happen in the future?  What happened since growing in number?  What happened before growing in number? What had already started before Senator Barbara Boxer shepherded the highway bill ? What happened since Senator Barbara Boxer shepherded the highway bill ?