SN4 ""

No	Pattern	Freq
1	it be [adv] [vb pp] that [adj]	411
2	it is [adv] [verb] that [adj]	249
3	it be [adv] [verb] that [det]	224
4	it was [adv] [verb] that [adj]	163
5	it be [adv] [verb] that [adj]	161
6	it be [adv] [verb] that this	71
7	it be [adv] [verb] that this	71
8	it be also [verb] that [adj]	70
9	it be generally [verb] that [adj]	48
10	it be widely [verb] that [adj]	41
11	it be [adv] assume that [adj]	37
12	it be [adv] know that [adj]	37
13	it be [adv] known that [adj]	37
14	it be [adv] assumed that [adj]	37
15	it be [adv] accept that [adj]	33
16	it be [adv] accepted that [adj]	33
17	it be [adv] [verb] that [num]	32
18	it be well [verb] that [adj]	32
19	it be often [verb] that [adj]	30
20	it be now [verb] that [adj]	26
21	it be [adv] agreed that [adj]	24
22	it be [adv] agree that [adj]	24
23	it be [adv] [verb] that some	23
24	it be [adv] [verb] that such	23
25	it be [adv] [verb] that these	23
26	it be [adv] [verb] that these	23
27	it be [adv] [verb] that such	23
28	it be [adv] [verb] that some	23
29	it be [adv] [verb] that all	20
30	it be [adv] [verb] that all	20