SN4 ""

No	Pattern	Freq
1	it have been [verb] that [adj]	115
2	it have be [vb pp] that [adj]	115
3	it have be [verb] that [adj]	115
4	it have be [verb] that [adj]	115
5	it has be [verb] that [adj]	105
6	it have be suggested that [adj]	22
7	it have be suggest that [adj]	22
8	it have be shown that [adj]	13
9	it have be argued that [adj]	13
10	it have be argue that [adj]	13
11	it have be show that [adj]	13
12	it have be estimate that [adj]	8
13	it have be claim that [adj]	8
14	it have be estimated that [adj]	8
15	it have be claimed that [adj]	8
16	it had be [verb] that [adj]	8
17	it have be found that [adj]	6
18	it have be find that [adj]	6
19	it have be report that [adj]	6
20	it have be reported that [adj]	6
21	it have be assumed that [adj]	5
22	it have be established that [adj]	5
23	it have be assume that [adj]	5
24	it have be establish that [adj]	5