SN4 ""

No	Pattern	Freq
1	[that] it have been [verb] [prep]	148
2	that it have been [verb] [prep]	148
3	[that] it have been [vb pp] [prep]	137
4	[that] it had been [verb] [prep]	96
5	[that] it have been [verb] by	54
6	[that] it have been [verb] by	54
7	[that] it has been [verb] [prep]	44
8	[that] it have been [verb] in	18
9	[that] it have been [verb] in	18
10	[that] it have been [verb] to	16
11	[that] it have been [verb] to	16
12	[that] it have been [v-ing] [prep]	11
13	[that] it have been [verb] for	10
14	[that] it have been [verb] for	10
15	[that] it have been [verb] at	9
16	[that] it have been [verb] with	9
17	[that] it have been [verb] with	9
18	[that] it have been [verb] at	9
19	[that] it have been [verb] from	8
20	[that] it 's been [verb] [prep]	8
21	[that] it have been [verb] from	8
22	[that] it have been [verb] on	7
23	[that] it have been [verb] on	7
24	[that] it have been made [prep]	5
25	[that] it have been write [prep]	5
26	[that] it have been make [prep]	5
27	[that] it have been written [prep]	5