SN4 ""

No	Pattern	Freq
1	that [pers pn] [vb mod] have been [adj]	121
2	that [pers pn] [modal v] have been [adj]	121
3	that [pers pn] [modal v] have been [adj]	120
4	that [pers pn] [modal v] have been [adj]	90
5	that [pers pn] would have been [adj]	67
6	that it [modal v] have been [adj]	65
7	that [pers pn] would have been [adj]	64
8	that [pers pn] [modal v] have been [adj -er]	21
9	that he [modal v] have been [adj]	20
10	that [pers pn] might have been [adj]	20
11	that [pers pn] might have been [adj]	20
12	that [pers pn] [modal v] have been better	16
13	that [pers pn] [modal v] have been good	16
14	that [pers pn] must have been [adj]	12
15	that [pers pn] must have been [adj]	12
16	that they [modal v] have been [adj]	11
17	that you [modal v] have been [adj]	8
18	that [pers pn] should have been [adj]	8
19	that [pers pn] [modal v] have been able	8
20	that [pers pn] [modal v] have been able	8
21	that [pers pn] should have been [adj]	8
22	that i [modal v] have been [adj]	8
23	that [pers pn] may have been [adj]	7
24	that [pers pn] may have been [adj]	7
25	that [pers pn] could have been [adj]	7
26	that she [modal v] have been [adj]	7
27	that [pers pn] could have been [adj]	7
28	that [pers pn] [modal v] have been [num]	6