SN4 ""

No	Pattern	Freq
1	[vb mod] have been a [noun]	816
2	[modal v] have been a [noun]	797
3	[modal v] have been a [noun sg]	795
4	would have been a [noun]	198
5	would have been a [noun]	189
6	must have been a [noun]	181
7	must have been a [noun]	181
8	could have been a [noun]	128
9	could have been a [noun]	128
10	might have been a [noun]	115
11	might have been a [noun]	115
12	may have been a [noun]	113
13	may have been a [noun]	113
14	should have been a [noun]	70
15	should have been a [noun]	70
16	[modal v] have been a lot	45
17	[modal v] have been a lot	45
18	[modal v] have been a bit	40
19	[modal v] have been a bit	40
20	[modal v] 've been a [noun]	17
21	[modal v] have been a disaster	15
22	[modal v] have been a factor	15
23	[modal v] have been a disaster	15
24	[modal v] have been a factor	15
25	[modal v] have been a mistake	14
26	[modal v] have been a mistake	14
27	[modal v] have been a time	12
28	[modal v] have been a time	12
29	[modal v] have been a shock	11
30	[modal v] have been a shock	11