SN4 ""

No	Pattern	Freq
1	it have been [vb pp] [prep]	1838
2	it has been [vb pp] [prep]	934
3	it had been [vb pp] [prep]	665
4	it have been [vb pp] by	483
5	it have been [vb pp] in	293
6	it have been [vb pp] to	225
7	it 's been [vb pp] [prep]	215
8	it have been [vb pp] for	172
9	it have been [vb pp] as	108
10	it have been [vb pp] with	92
11	it have been [vb pp] on	80
12	it have been [vb pp] from	79
13	it have been [vb pp] at	69
14	it have been [vb pp] into	67
15	it have been used [prep]	57
16	it have been known [prep]	49
17	it have been suggested [prep]	47
18	it have been shown [prep]	34
19	it have been made [prep]	32
20	it have been [vb pp] of	30
21	it have been done [prep]	26
22	it have been left [prep]	23
23	it have been recorded [prep]	23
24	it have been built [prep]	22
25	it have been written [prep]	21
26	it have been found [prep]	19
27	it have been argued [prep]	19
28	it have been taken [prep]	19
29	it have been described [prep]	19
30	it have been held [prep]	19