Example sentences of "back and forth [prep] a [noun sg] " in BNC.

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1 This involved a 65mm camera that could do stop-motion by leaving the shutter open for an extended time and also refocus automatically while moving back and forth on a track as well as up and down , if necessary .
2 Again , if you find you arc always walking back and forth to a larder or pantry , or to shelves at the other end of the kitchen , a storage trolley or cart which you could wheel up when necessary should help .
3 But no response came from the darkness , and after swaying precariously back and forth for a minute or two , his feet slipped on the twisting bamboo rods and he fell to his knees .
4 She twitched the hand-written parchment pages back and forth for a moment or two looking for them , then caught his amused glance .
5 Joseph found he could n't sit still and he rose to pace back and forth at a distance from the others .
6 There was about her something distant and mysterious , Cadfael thought , as if a part of her being was charmed away into some private and pleasant place , even while her blue eyes dwelt upon her husband and his friend with sharp intelligence , following the argument back and forth with a kind of indulgent and amused affection , appropriate to a matriarch watching her children .
7 Instead of staring blankly out at the world , or nervously striking at the fence , as some of the eagles did , he trekked back and forth in a figure of eight over an area that was only one tiny part of his caged area .
8 For many minutes , Ali , Asaad and Isaac plod back and forth in a chain through the snow .
9 A typical building of 10 storeys will sway back and forth in a period of 1 second , giving it a natural frequency of 1 cycle per second or 1 hertz .
10 Those of a pike have become elegant filmy sculls , rotating slowly back and forth from a joint within the body , so that the fish can compensate for the tiniest variation of current and hang above a rock as though it were suspended from an invisible wire .
11 She almost dropped the line in disgust , but managed to hold it and started to swing it back and forth like a skipping rope in wider and wider slow arcs .
12 Or does it merely shuttle back and forth like a ferry ?
13 The eyes shifted back and forth like a metronome .
14 Laverne trots back and forth like a dog that wo n't give up , outside an entrance the size of a tea-cup .
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