SN4 ""

No	Pattern	Freq
1	[verb] back at the [adj] [noun]	68
2	look back at the [adj] [noun]	35
3	[vb past] back at the [adj] [noun]	27
4	[v-ing] back at the [adj] [noun]	20
5	[adv] back at the [adj] [noun]	12
6	looked back at the [adj] [noun]	12
7	looking back at the [adj] [noun]	10
8	[adv] back at the [adj] [noun]	10
9	be back at the [adj] [noun]	8
10	glance back at the [adj] [noun]	8
11	[be] back at the [adj] [noun]	8
12	[to-vb] back at the [adj] [noun]	6
13	[vb base] back at the [adj] [noun]	6
14	[was/were] back at the [adj] [noun]	5
15	to look back at the [adj] [noun]	5
16	was back at the [adj] [noun]	5
17	back [adv] at the [adj] [noun]	5
18	back at the [adj] [adj] [noun]	7
19	back at the [adj] [adj] [noun]	5
20	back at the [adj] [noun] [noun]	10
21	back at the [adj] [adj] [noun]	7
22	back at the [adj] [adj] [noun]	7
23	back at the [adj] [noun sg] [noun]	6
24	back at the [adj] [noun] [prep]	29
25	back at the [adj] [noun] [prep]	29
26	back at the [adj] [noun] of	16
27	back at the [adj] [noun] of	16
28	back at the [adj] [noun] [conj]	13
29	back at the [adj] [noun] [noun]	10
30	back at the [adj] [noun] and	7