SN4 ""

No	Pattern	Freq
1	have been [vb pp] for [det]	369
2	has be [vb pp] for [det]	129
3	have be [vb pp] for some	101
4	had be [vb pp] for [det]	98
5	have be [vb pp] for [det]	95
6	have be [vb pp] for many	67
7	have be [vb pp] for this	55
8	have be known for [det]	32
9	have be used for [det]	27
10	have be [vb pp] for [det]	26
11	have be [vb pp] for several	19
12	have be [vb pp] for all	17
13	have be made for [det]	16
14	have be [vb pp] for another	12
15	have be [vb pp] for any	12
16	have be [vb pp] for each	11
17	have be [vb pp] for these	11
18	have be [vb pp] for such	10
19	have be [vb pp] for those	10
20	have be established for [det]	9
21	have be recognised for [det]	9
22	have be [vb pp] for that	9
23	have be [vb pp] for most	9
24	've be [vb pp] for [det]	8
25	have be chosen for [det]	7
26	's be [vb pp] for [det]	7
27	have be [vb pp] for more	6
28	to have be [vb pp] for [det]	6
29	have be [vb pp] for less	5
30	have be [vb pp] for both	5