SN4 ""

No	Pattern	Freq
1	[pron] have been an [adj]	333
2	[noun] have been an [adj]	177
3	there have been an [adj]	162
4	there have been an [adj]	162
5	[ex0] have been an [adj]	162
6	[pers pn] have been an [adj]	135
7	[modal v] have been an [adj]	127
8	[vb mod] have been an [adj]	127
9	[noun sg] have been an [adj]	108
10	it have been an [adj]	82
11	it have been an [adj]	82
12	would have been an [adj]	50
13	would have been an [adj]	49
14	[noun prp] have been an [adj]	45
15	[verb] have been an [adj]	36
16	[adv] have been an [adj]	30
17	he have been an [adj]	29
18	he have been an [adj]	29
19	[adj] have been an [adj]	29
20	must have been an [adj]	26
21	must have been an [adj]	26
22	may have been an [adj]	25
23	may have been an [adj]	25
24	[noun pl] have been an [adj]	23
25	[Wh det] have been an [adj]	22
26	[det] have been an [adj]	19
27	[adv] have been an [adj]	19
28	this have been an [adj]	18
29	this have been an [adj]	18
30	[vb -s] have been an [adj]	17