SN4 ""

No	Pattern	Freq
1	it have been [adj] [verb]	281
2	it have been [adj] [to-vb]	273
3	it have been [adj] [prep]	263
4	it have been [adj] [prep]	263
5	it have been [adj] for	115
6	it have been [adj] for	115
7	it have been [adj] [conj]	85
8	it have been [adj] [noun]	63
9	it have been [adj] [noun sg]	59
10	it have been [adj] [adv]	51
11	it have been [adj] [coord]	45
12	it have been [adj] in	40
13	it have been [adj] in	40
14	it have been [adj] to	38
15	it have been [adj] to	38
16	it have been [adj] [adv]	37
17	it have been [adj] and	33
18	it have been [adj] and	33
19	it have been [adj] [subord]	24
20	it have been [adj] [adj]	18
21	it have been [adj] enough	17
22	it have been [adj] enough	17
23	it have been [adj] that	16
24	it have been [adj] that	16
25	it have been [adj] [that]	16
26	it have been [adj] of	13
27	it have been [adj] of	13
28	it have been [adj] from	13
29	it have been [adj] from	13
30	it have been [adj] [det]	12