SN4 ""

No	Pattern	Freq
1	be [verb] back [prep] the	249
2	be [vb pp] back [prep] the	214
3	be [verb] back to the	130
4	be [verb] back into the	47
5	be trace back [prep] the	43
6	be traced back [prep] the	43
7	be [v-ing] back [prep] the	33
8	be [verb] back by the	18
9	be [verb] back in the	11
10	be go back [prep] the	10
11	be going back [prep] the	9
12	be ploughed back [prep] the	8
13	be dragged back [prep] the	8
14	be bring back [prep] the	8
15	be drag back [prep] the	8
16	be plough back [prep] the	8
17	be brought back [prep] the	8
18	be send back [prep] the	7
19	be [verb] back from the	7
20	be put back [prep] the	7
21	be put back [prep] the	7
22	be sent back [prep] the	7
23	be [verb] back on the	7
24	be [verb] back for the	7
25	be take back [prep] the	6
26	be refer back [prep] the	6
27	be feed back [prep] the	6
28	be referred back [prep] the	6
29	be taken back [prep] the	6
30	be fed back [prep] the	6