SN4 ""

No	Pattern	Freq
1	[conj] it have been [verb] for	66
2	[subord] it have been [verb] for	41
3	[coord] it have been [verb] for	15
4	[noun] it have been [verb] for	13
5	[adv] it have been [verb] for	13
6	that it have been [verb] for	10
7	if it have been [verb] for	10
8	[that] it have been [verb] for	10
9	if it have been [verb] for	10
10	that it have been [verb] for	10
11	[noun sg] it have been [verb] for	9
12	[Wh det] it have been [verb] for	9
13	[pron] it have been [verb] for	9
14	as it have been [verb] for	8
15	but it have been [verb] for	8
16	which it have been [verb] for	8
17	[verb] it have been [verb] for	8
18	which it have been [verb] for	8
19	as it have been [verb] for	8
20	but it have been [verb] for	8
21	and it have been [verb] for	7
22	and it have been [verb] for	7
23	[Wh adv] it have been [verb] for	7
24	[adv] it have been [verb] for	6
25	when it have been [verb] for	5
26	[prep] it have been [verb] for	5
27	[prep] it have been [verb] for	5
28	when it have been [verb] for	5
29	it [vb mod] have been [verb] for	21
30	it [modal v] have been [verb] for	21