SN4 ""

No	Pattern	Freq
1	it be [adv] known [conj] [pron]	54
2	it be [adv] known [conj] [pers pn]	39
3	it is [adv] known [conj] [pron]	37
4	it be [adv] known that [pron]	28
5	it be [adv] known [conj] [pron]	28
6	it be [adv] known that [pron]	28
7	it be [adv] known [that] [pron]	28
8	it be [adv] known [subord] [pron]	26
9	it be not known [conj] [pron]	26
10	it be [not/n't] known [conj] [pron]	26
11	it be not known [conj] [pron]	25
12	it be well known [conj] [pron]	17
13	it be well known [conj] [pron]	17
14	it was [adv] known [conj] [pron]	14
15	it be [adv] known whether [pron]	12
16	it be [adv] known [conj] they	12
17	it be [adv] known [conj] they	12
18	it be [adv] known whether [pron]	12
19	it be [adv] known [conj] there	11
20	it be [adv] known [conj] [ex0]	11
21	it be [adv] known [conj] there	11
22	it be [adv] known [conj] he	10
23	it be [adv] known [conj] he	10
24	it be [adv] known [conj] it	8
25	it be [adv] known [conj] it	8
26	it be [adv] known if [pron]	6
27	it be [adv] known if [pron]	6