SN4 ""

No	Pattern	Freq
1	[vb mod] have been [prep] [det] [noun]	53
2	[vb mod] have been [prep] [det] [noun sg]	49
3	[vb mod] have been in [det] [noun]	22
4	must have been [prep] [det] [noun]	16
5	[vb mod] have been [prep] this [noun]	16
6	[vb mod] have been [prep] that [noun]	12
7	could have been [prep] [det] [noun]	11
8	[vb mod] have been [prep] some [noun]	11
9	would have been [prep] [det] [noun]	10
10	[vb mod] have been at [det] [noun]	10
11	may have been [prep] [det] [noun]	7
12	[vb mod] have been [prep] any [noun]	7
13	[vb mod] have been of [det] [noun]	7
14	[vb mod] have been [prep] [det] time	5
15	[vb mod] have been [prep] [det] [noun pl]	5
16	[vb mod] have been [prep] [det] time	5