SN4 ""

No	Pattern	Freq
1	[vb mod] have been [noun sg] [prep]	85
2	[vb mod] have been [noun] of	57
3	[vb mod] have been [noun pl] [prep]	57
4	would have been [noun] [prep]	40
5	may have been [noun] [prep]	38
6	must have been [noun] [prep]	29
7	[vb mod] have been [noun] in	26
8	[vb mod] have been part [prep]	26
9	[vb mod] have been part [prep]	26
10	[vb mod] have been [noun] for	20
11	might have been [noun] [prep]	14
12	could have been [noun] [prep]	13
13	[vb mod] have been [noun] to	12
14	should have been [noun] [prep]	10
15	[vb mod] have been [noun] on	8
16	[vb mod] have been [noun] with	6
17	[vb mod] have been [n mass] [prep]	5
18	[vb mod] have been [noun prp] [prep]	5
19	'd have been [noun] [prep]	5