SN4 ""

No	Pattern	Freq
1	[adv] [adv] have [be]	335
2	[adv] [vb mod] have [be]	303
3	[adv] [modal v] have [be]	303
4	[adv] [adv] have [be]	296
5	[adv] would have [be]	156
6	[adv] would have [be]	154
7	[adv] might have [be]	39
8	[adv] might have [be]	39
9	[adv] [not/n't] have [be]	39
10	[adv] not have [be]	39
11	[adv] not have [be]	39
12	[adv] easily have [be]	38
13	[adv] easily have [be]	38
14	[adv] certainly have [be]	33
15	[adv] certainly have [be]	33
16	[adv] must have [be]	32
17	[adv] must have [be]	32
18	[adv] [pron] have [be]	30
19	[adv] [pers pn] have [be]	29
20	[adv] could have [be]	27
21	[adv] could have [be]	27
22	[adv] well have [be]	26
23	[adv] well have [be]	26
24	[adv] possibly have [be]	24
25	[adv] possibly have [be]	24
26	[adv] should have [be]	22
27	[adv] should have [be]	22
28	[adv] even have [be]	21
29	[adv] even have [be]	21
30	[adv] may have [be]	20