SN4 ""

No	Pattern	Freq
1	it [be] [verb] that the [adj]	457
2	it be [verb] [that] the [adj]	457
3	it [be] [vb pp] [that] the [adj]	449
4	it [was/were] [verb] [that] the [adj]	227
5	it was [verb] [that] the [adj]	227
6	it [is] [verb] [that] the [adj]	220
7	it is [verb] [that] the [adj]	215
8	it [be] assumed [that] the [adj]	26
9	it [be] assume [that] the [adj]	26
10	it [be] [verb] [that] the new	25
11	it [be] suggest [that] the [adj]	22
12	it [be] suggested [that] the [adj]	22
13	it [be] thought [that] the [adj]	21
14	it [be] think [that] the [adj]	21
15	it [be] say [that] the [adj]	21
16	it [be] argue [that] the [adj]	20
17	it [be] argued [that] the [adj]	20
18	it [be] felt [that] the [adj]	20
19	it [be] said [that] the [adj]	20
20	it [be] hoped [that] the [adj]	20
21	it [be] agreed [that] the [adj]	20
22	it [be] feel [that] the [adj]	20
23	it [be] hope [that] the [adj]	20
24	it [be] agree [that] the [adj]	20
25	it [be] estimate [that] the [adj]	18
26	it [be] estimated [that] the [adj]	18
27	it [be] believe [that] the [adj]	17
28	it [be] believed [that] the [adj]	16
29	it [be] found [that] the [adj]	14
30	it [be] announce [that] the [adj]	14