SN4 ""

No	Pattern	Freq
1	it be often [verb] [conj]	181
2	it [be] often [vb pp] [conj]	181
3	it [is] often [verb] [conj]	168
4	it [be] often [verb] [that]	163
5	it [be] often [verb] that	163
6	it [be] often [verb] that	163
7	it is often [verb] [conj]	163
8	it [be] often said [conj]	51
9	it [be] often say [conj]	51
10	it [be] often assume [conj]	27
11	it [be] often assumed [conj]	27
12	it [be] often argued [conj]	18
13	it [be] often argue [conj]	18
14	it [be] often [verb] [subord]	14
15	it was often [verb] [conj]	13
16	it [was/were] often [verb] [conj]	13
17	it [be] often claimed [conj]	12
18	it [be] often claim [conj]	12
19	it [be] often [verb] as	11
20	it [be] often [verb] as	11
21	it [be] often suggested [conj]	9
22	it [be] often suggest [conj]	9
23	it [be] often forget [conj]	7
24	it [be] often forgotten [conj]	7
25	it 's often [verb] [conj]	5
26	it [be] often found [conj]	5
27	it [be] often thought [conj]	5
28	it [be] often find [conj]	5
29	it [be] often think [conj]	5