SN4 ""

No	Pattern	Freq
1	[verb] back on the [noun]	384
2	[noun] back on the [noun]	151
3	be back on the [noun]	123
4	[be] back on the [noun]	123
5	[vb past] back on the [noun]	122
6	[noun sg] back on the [noun]	115
7	[pron] back on the [noun]	83
8	[v-ing] back on the [noun]	81
9	[pers pn] back on the [noun]	73
10	[to-vb] back on the [noun]	55
11	[was/were] back on the [noun]	45
12	look back on the [noun]	44
13	[adv] back on the [noun]	42
14	go back on the [noun]	40
15	[adv] back on the [noun]	40
16	lie back on the [noun]	38
17	was back on the [noun]	38
18	[vb pp] back on the [noun]	37
19	[vb base] back on the [noun]	37
20	get back on the [noun]	36
21	fall back on the [noun]	35
22	[be] back on the [noun]	32
23	be back on the [noun]	32
24	[vb infin] back on the [noun]	31
25	it back on the [noun]	31
26	it back on the [noun]	31
27	lay back on the [noun]	27
28	come back on the [noun]	24
29	[is] back on the [noun]	23
30	[noun pl] back on the [noun]	22