SN4 ""

No	Pattern	Freq
1	it [be] often [verb] [that]	163
2	it be often [verb] [that]	163
3	it [be] often [vb pp] [that]	163
4	it [be] often [verb] that	163
5	it [is] often [verb] [that]	154
6	it is often [verb] [that]	150
7	it [be] often say [that]	51
8	it [be] often said [that]	51
9	it [be] often assumed [that]	27
10	it [be] often assume [that]	27
11	it [be] often argue [that]	18
12	it [be] often argued [that]	18
13	it [be] often claim [that]	12
14	it [be] often claimed [that]	12
15	it [be] often suggested [that]	9
16	it [was/were] often [verb] [that]	9
17	it [be] often suggest [that]	9
18	it was often [verb] [that]	9
19	it [be] often forget [that]	7
20	it [be] often forgotten [that]	7
21	it [be] often found [that]	5
22	it [be] often think [that]	5
23	it [be] often find [that]	5
24	it [be] often thought [that]	5