SN4 ""

No	Pattern	Freq
1	[conj] it have been [adj]	315
2	[subord] it have been [adj]	158
3	[noun] it have been [adj]	97
4	[coord] it have been [adj]	95
5	[adv] it have been [adj]	92
6	if it have been [adj]	69
7	if it have been [adj]	69
8	[verb] it have been [adj]	68
9	[adv] it have been [adj]	62
10	that it have been [adj]	62
11	[that] it have been [adj]	62
12	that it have been [adj]	62
13	and it have been [adj]	59
14	and it have been [adj]	59
15	[noun sg] it have been [adj]	58
16	but it have been [adj]	36
17	but it have been [adj]	36
18	[noun pl] it have been [adj]	33
19	[vb mod] it have been [adj]	27
20	[modal v] it have been [adj]	27
21	say it have been [adj]	25
22	[adj] it have been [adj]	24
23	[Wh adv] it have been [adj]	22
24	would it have been [adj]	20
25	would it have been [adj]	20
26	[vb past] it have been [adj]	19
27	as it have been [adj]	17
28	[pron] it have been [adj]	17
29	[vb -s] it have been [adj]	17
30	as it have been [adj]	17