SN4 ""

No	Pattern	Freq
1	[conj] it have been [noun]	62
2	[subord] it have been [noun]	33
3	if it have been [noun]	24
4	if it have been [noun]	24
5	[noun] it have been [noun]	22
6	[coord] it have been [noun]	20
7	[adv] it have been [noun]	17
8	but it have been [noun]	14
9	but it have been [noun]	14
10	[adv] it have been [noun]	11
11	[noun sg] it have been [noun]	10
12	[that] it have been [noun]	9
13	that it have been [noun]	9
14	that it have been [noun]	9
15	[adj] it have been [noun]	8
16	[verb] it have been [noun]	8
17	[modal v] it have been [noun]	7
18	[vb mod] it have been [noun]	7
19	[noun pl] it have been [noun]	7
20	[prep] it have been [noun]	6
21	and it have been [noun]	6
22	[prep] it have been [noun]	6
23	and it have been [noun]	6
24	could it have been [noun]	5
25	[pron] it have been [noun]	5
26	year it have been [noun]	5
27	[vb past] it have been [noun]	5
28	could it have been [noun]	5
29	[noun prp] it have been [noun]	5
30	it [vb mod] have been [noun]	172