SN4 ""

No	Pattern	Freq
1	[subord] it have been [prep]	238
2	[conj] it had been [prep]	183
3	[conj] it have been in	112
4	as it have been [prep]	107
5	as it have been [prep]	107
6	than it have been [prep]	81
7	than it have been [prep]	81
8	[conj] it has been [prep]	73
9	[conj] it have been for	41
10	[coord] it have been [prep]	31
11	[conj] it 's been [prep]	28
12	[conj] it have been at	19
13	[conj] it have been before	17
14	[conj] it have been on	17
15	but it have been [prep]	17
16	but it have been [prep]	17
17	if it have been [prep]	16
18	that it have been [prep]	16
19	[that] it have been [prep]	16
20	that it have been [prep]	16
21	if it have been [prep]	16
22	and it have been [prep]	14
23	and it have been [prep]	14
24	[conj] it have been since	10
25	[conj] it have been worth	9
26	[conj] it have been of	9
27	[conj] it have been with	7
28	[conj] it have been under	6
29	[conj] it have been to	6
30	because it have been [prep]	5