Definition of "move back and forth" [move back and forth]
Move in one direction and then into the opposite direction(verb)
WordNet. Princeton University. 2010.
Use "move back and forth" in a sentence
"Later in the month, he went again to Los Angeles, this time to North American (and with Bill Anders), to review the design for the tunnel through which the astronauts would move back and forth between the Apollo command and service module (CSM) and the LM."
"I have taken the liberty of hypertagging the poems in the on-line edition, to indicate where notes are available and to make it easier to move back and forth between poems and notes."
"Christophers views were less settled; he tended to move back and forth between more or less engagement, often reflecting where he thought the president might end up."