SN4 ""

No	Pattern	Freq
1	it have [adv] [be] [vb pp] that	433
2	it have [adv] be [vb pp] that	433
3	it have [adv] been [vb pp] that	433
4	it have [adv] [been] [vb pp] that	433
5	it has [adv] [be] [vb pp] that	371
6	it have also [be] [vb pp] that	96
7	it have [adv] [be] suggested that	81
8	it have long [be] [vb pp] that	69
9	it have already [be] [vb pp] that	61
10	it had [adv] [be] [vb pp] that	49
11	it have often [be] [vb pp] that	39
12	it have [adv] [be] argued that	34
13	it have [adv] [be] shown that	27
14	it have [adv] [be] said that	26
15	it have recently [be] [vb pp] that	24
16	it have [adv] [be] noted that	24
17	it have [adv] [be] recognised that	22
18	it have even [be] [vb pp] that	20
19	it have always [be] [vb pp] that	20
20	it have [adv] [be] assumed that	17
21	it have now [be] [vb pp] that	16
22	it have [adv] [be] known that	15
23	it have previously [be] [vb pp] that	14
24	it have sometimes [be] [vb pp] that	14
25	it 's [adv] [be] [vb pp] that	13
26	it have [adv] [be] accepted that	13
27	it have [adv] [be] observed that	12
28	it have [adv] [be] recognized that	11
29	it have [adv] [be] found that	10
30	it have [adv] [be] held that	9