SN4 ""

No	Pattern	Freq
1	[conj] [det] have been a [noun]	19
2	[prep] [det] have been a [noun]	10
3	[prep] [det] have been a [noun]	10
4	[coord] [det] have been a [noun]	10
5	[subord] [det] have been a [noun]	8
6	of [det] have been a [noun]	6
7	of [det] have been a [noun]	6
8	but [det] have been a [noun]	5
9	if [det] have been a [noun]	5
10	but [det] have been a [noun]	5
11	and [det] have been a [noun]	5
12	if [det] have been a [noun]	5
13	and [det] have been a [noun]	5
14	[det] [modal v] have been a [noun]	52
15	[det] [vb mod] have been a [noun]	52
16	[det] [noun] have been a [noun]	38
17	[det] [noun sg] have been a [noun]	29
18	[det] would have been a [noun]	23
19	[det] would have been a [noun]	23
20	[det] may have been a [noun]	8
21	[det] may have been a [noun]	8
22	[det] must have been a [noun]	7
23	[det] [noun pl] have been a [noun]	7
24	[det] could have been a [noun]	7
25	[det] could have been a [noun]	7
26	[det] must have been a [noun]	7
27	[det] have [adv] been a [noun]	24
28	[det] have [adv] been a [noun]	22
29	[det] have always been a [noun]	9
30	[det] have always been a [noun]	9